在Oracle中查询表的大小、表的占用情况和表空间的大小

落日映苍穹つ 2022-04-03 06:58 237阅读 0赞

有两种含义的表大小。一种是分配给一个表的物理空间数量，而不管空间是否被使用。可以这样查询获得字节数：  
  
select segment\_name, bytes  
from user\_segments  
where segment\_type = 'TABLE';  
或者  
   Select Segment\_Name,Sum(bytes)/1024/1024 From User\_Extents Group By Segment\_Name  
  
另一种表实际使用的空间。这样查询：  
  
analyze table emp compute statistics;  
select num\_rows \* avg\_row\_len  
from user\_tables  
where table\_name = 'EMP';  
  
查看每个表空间的大小  
Select Tablespace\_Name,Sum(bytes)/1024/1024 From Dba\_Segments Group By Tablespace\_Name

1.**查看剩余表空间大小**

SELECT tablespace\_name 表空间,sum(blocks\*8192/1000000) 剩余空间M FROM dba\_free\_space GROUP BY tablespace\_name;

**2.检查系统中所有表空间总体空间**

select b.name,sum(a.bytes/1000000)总空间 from v$datafile a,v$tablespace b where a.ts\#=b.ts\# group by b.name;

1、查看Oracle数据库中表空间信息的工具方法：

使用oracle enterprise manager console工具，这是oracle的客户端工具，当安装oracle服务器或客户端时会自动安装此工具，在windows操作系统上完成oracle安装后，通过下面的方法登录该工具：开始菜单——程序——Oracle-OraHome92——Enterprise Manager Console(单击)——oracle enterprise manager console登录——选择‘独立启动’单选框——‘确定’ —— ‘oracle enterprise manager console，独立’ ——选择要登录的‘实例名’ ——弹出‘数据库连接信息’ ——输入’用户名/口令’ (一般使用sys用户)，’连接身份’选择选择SYSDBA——‘确定’，这时已经成功登录该工具，选择‘存储’ ——表空间，会看到如下的界面，该界面显示了表空间名称，表空间类型，区管理类型，以”兆”为单位的表空间大小，已使用的表空间大小及表空间利用率。![d0a07b6d-e7ac-4566-b3ed-7e34e6b7aa75.jpg][]

图1 表空间大小及使用率

2、查看Oracle数据库中表空间信息的命令方法：

通过查询数据库系统中的数据字典表(data dictionary tables)获取表空间的相关信息，首先使用客户端工具连接到数据库,这些工具可以是SQLPLUS字符工具、TOAD、PL/SQL等,连接到数据库后执行如下的查询语句：

select

a.a1 表空间名称,

c.c2 类型,

c.c3 区管理,

b.b2/1024/1024 表空间大小M,

(b.b2-a.a2)/1024/1024 已使用M,

substr((b.b2-a.a2)/b.b2\*100,1,5) 利用率

from

(select tablespace\_name a1, sum(nvl(bytes,0)) a2 from dba\_free\_space group by tablespace\_name) a,

(select tablespace\_name b1,sum(bytes) b2 from dba\_data\_files group by tablespace\_name) b,

(select tablespace\_name c1,contents c2,extent\_management c3 from dba\_tablespaces) c

where a.a1=b.b1 and c.c1=b.b1;

该语句通过查询dba\_free\_space，dba\_data\_files，dba\_tablespaces这三个数据字典表，得到了表空间名称，表空间类型，区管理类型，以”兆”为单位的表空间大小，已使用的表空间大小及表空间利用率。dba\_free\_space表描述了表空间的空闲大小，dba\_data\_files表描述了数据库中的数据文件，dba\_tablespaces表描述了数据库中的表空间。

上面语句中from子句后有三个select语句，每个select语句相当于一个视图，视图的名称分别为a、b、c，通过它们之间的关联关系，我们得到了表空间的相关信息。

语句执行结果如下：

<table style="margin:auto auto auto 21pt; width:474.15pt; border-collapse:collapse"> 
 <tbody> 
  <tr style="height:13.5pt"> 
   <td style="padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; width:92.4pt; padding-top:0cm; height:13.5pt; background-color:transparent; border:windowtext 1pt solid"> 
    <div> 
     <span style="color:black">表空间名称</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">类型</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">区管理</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">表空间大小M</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">已使用M</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">利用率</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">CWMLITE</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">PERMANENT</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">20</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">9.375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">46.87</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">DRSYS</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">PERMANENT</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">20</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">9.6875</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">48.43</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">EXAMPLE</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">PERMANENT</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">149.375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">149.25</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">99.91</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">INDX</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">PERMANENT</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">25</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">0.0625</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">0.25</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">ODM</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">PERMANENT</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">20</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">9.375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">46.87</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">SYSTEM</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">PERMANENT</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">400</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">397.375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">99.34</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">TOOLS</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">PERMANENT</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">10</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">6.0625</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">60.62</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">UNDOTBS1</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">UNDO</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">200</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">5.9375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">2.968</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">USERS</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">PERMANENT</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">25</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">0.0625</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">0.25</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:92.4pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">XDB</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:90pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">PERMANENT</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:72pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">LOCAL</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">38.125</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:59.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">37.9375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:80.35pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">99.5</span> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

上面描述中分别介绍了查看Oracle数据库中表空间信息的工具方法和命令方法。

1、查看Oracle数据库中数据文件信息的工具方法：

使用上面介绍过的方法登录oracle enterprise manager console工具，选择‘存储’ ——数据文件，会看到如下的界面，该界面显示了数据文件名称，表空间名称，以”兆”为单位的数据文件大小，已使用的数据文件大小及数据文件利用率。

![013f3b78-f2e7-4d50-9480-561ff133b247.jpg][]

图2 数据文件大小及使用率

2、查看Oracle数据库中数据文件信息的命令方法：

通过查询数据库系统中的数据字典表(data dictionary tables)获取数据文件的相关信息，首先使用客户端工具连接到数据库,这些工具可以是SQLPLUS字符工具、TOAD、PL/SQL等,连接到数据库后执行如下的查询语句：

select

b.file\_name 物理文件名,

b.tablespace\_name 表空间,

b.bytes/1024/1024 大小M,

(b.bytes-sum(nvl(a.bytes,0)))/1024/1024 已使用M,

substr((b.bytes-sum(nvl(a.bytes,0)))/(b.bytes)\*100,1,5) 利用率

from dba\_free\_space a,dba\_data\_files b

where a.file\_id=b.file\_id

group by b.tablespace\_name,b.file\_name,b.bytes

order by b.tablespace\_name

语句执行结果如下：

<table style="margin:auto auto auto 4.65pt; width:468.9pt; border-collapse:collapse"> 
 <tbody> 
  <tr style="height:13.5pt"> 
   <td style="padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; width:214.3pt; padding-top:0cm; height:13.5pt; background-color:transparent; border:windowtext 1pt solid"> 
    <div> 
     <span style="color:black">物理文件名</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">表空间</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">大小M</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">已使用M</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">利用率</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/CWMLITE01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">CWMLITE</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">20</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">9.375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">46.87</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/DRSYS01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">DRSYS</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">20</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">9.6875</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">48.43</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/EXAMPLE01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">EXAMPLE</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">149.375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">149.25</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">99.91</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/INDX01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">INDX</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">25</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">0.0625</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">0.25</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/ODM01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">ODM</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">20</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">9.375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">46.87</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/SYSTEM01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">SYSTEM</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">400</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">397.375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">99.34</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/TOOLS01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">TOOLS</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">10</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">6.0625</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">60.62</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/UNDOTBS01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">UNDOTBS1</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">200</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">5.9375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">2.968</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/USERS01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">USERS</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">25</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">0.0625</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">0.25</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:214.3pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/XDB01.DBF</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:64.85pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">XDB</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:75.75pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">38.125</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:61.2pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">37.9375</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:52.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">99.5</span> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

上明描述中分别介绍了查看Oracle数据库中数据文件信息的工具方法和命令方法。

在oracle数据库中，临时表空间主要用于用户在使用order by 、group by语句进行排序和汇总时所需的临时工作空间。要查询数据库中临时表空间的名称，大小及数据文件，可以查询数据字典dba\_tablespaces及dba\_data\_files。命令如下：

select

a.talbespace\_name 表空间名称,

b.bytes 大小bytes,

b.file\_name 数据文件名

from dba\_tablespaces a, dba\_data\_files b

Where a.talbespace\_name=b.talbespace\_name and a.contents=’TEMPORARY’;

查询结果如下：

表空间名称大小bytes数据文件名

TEMPONLINEG:/ORACLE/ORADATA/ORA92/TEMP01.DBF

从oracle 9i开始，可以创建Temporary tablespace类表空间，即“临时“表空间，这类表空间使用临时文件。临时文件的信息被存储在数据字典V$tempfile中。命令如下：

Select file\#，status，name from V$tempfile;

查询数据字典V$tempfile结果如下：

<table style="margin:auto auto auto 4.65pt; width:476.95pt; border-collapse:collapse"> 
 <tbody> 
  <tr style="height:13.5pt"> 
   <td style="padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; width:142.5pt; padding-top:0cm; height:13.5pt; background-color:transparent; border:windowtext 1pt solid"> 
    <div> 
     <span style="color:black">FILE#</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:136.65pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">status</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; border-top:windowtext 1pt solid; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:197.8pt; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">NAME</span> 
    </div> </td> 
  </tr> 
  <tr style="height:13.5pt"> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; padding-bottom:0cm; border-left:windowtext 1pt solid; width:142.5pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">1</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:136.65pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">ONLINE</span> 
    </div> </td> 
   <td style="border-right:windowtext 1pt solid; padding-right:5.4pt; padding-left:5.4pt; border-left-color:#ece9d8; padding-bottom:0cm; width:197.8pt; border-top-color:#ece9d8; padding-top:0cm; border-bottom:windowtext 1pt solid; height:13.5pt; background-color:transparent"> 
    <div> 
     <span style="color:black">G:/ORACLE/ORADATA/ORA92/TEMP01.DBF</span> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

在上面介绍的方法中，建议掌握命令方法,因为你的环境可能没有图形工具，而SQLPLUS一般情况下都是可以使用的，有了命令脚本，很容易得到表空间和数据文件的相关信息。另外，数据库管理员应该多整理命令脚本，在需要时直接执行脚本以提高工作效率。

在数据库管理员的日常工作中，应该经常查询表空间的利用率，按照数据库系统的具体情况估算表空间的增长量，当表空间的利用率超过90%时，要及时采取措施，如清理历史表、历史数据以释放空间，向表空间中添加新的数据文件，扩展现有数据文件大小等方法来降低表空间的利用率，避免表空间利用率接近100%时，将产生空间不够的错误。

1.查询oracle表空间的使用情况

select b.file\_id　　文件ID,  
　　b.tablespace\_name　　表空间,  
　　b.file\_name　　　　　物理文件名,  
　　b.bytes　　　　　　　总字节数,  
　　(b.bytes-sum(nvl(a.bytes,0)))　　　已使用,  
　　sum(nvl(a.bytes,0))　　　　　　　　剩余,  
　　sum(nvl(a.bytes,0))/(b.bytes)\*100　剩余百分比  
　　from dba\_free\_space a,dba\_data\_files b  
　　where a.file\_id=b.file\_id  
　　group by b.tablespace\_name,b.file\_name,b.file\_id,b.bytes  
　　order by b.tablespace\_name

2.查询oracle系统用户的默认表空间和临时表空间

select default\_tablespace,temporary\_tablespace from dba\_users

3.查询单张表的使用情况

select segment\_name,bytes from dba\_segments where segment\_name = 'RE\_STDEVT\_FACT\_DAY' and owner = USER

RE\_STDEVT\_FACT\_DAY是您要查询的表名称

4.查询所有用户表使用大小的前三十名

select \* from (select segment\_name,bytes from dba\_segments where owner = USER order by bytes desc ) where rownum <= 30

5.查询当前用户默认表空间的使用情况

select tablespacename,sum(totalContent),sum(usecontent),sum(sparecontent),avg(sparepercent)  
from  
(  
SELECT b.file\_id as id,b.tablespace\_name as tablespacename,b.bytes as totalContent,(b.bytes-sum(nvl(a.bytes,0))) as usecontent,sum(nvl(a.bytes,0)) as sparecontent,sum(nvl(a.bytes,0))/(b.bytes)\*100  as sparepercent  
FROM dba\_free\_space a,dba\_data\_files b  
WHERE a.file\_id=b.file\_id and b.tablespace\_name = (select default\_tablespace from dba\_users where username = user)   
group by b.tablespace\_name,b.file\_name,b.file\_id,b.bytes  
)  
GROUP BY tablespacename

6.查询用户表空间的表

select   \*  from user\_tables

[d0a07b6d-e7ac-4566-b3ed-7e34e6b7aa75.jpg]: /images/20220403/7b38c9344e7146eba6682156f8452dc4.png
[013f3b78-f2e7-4d50-9480-561ff133b247.jpg]: /images/20220403/4d1a4bff7e9f4072a2c7f782fba7ecd3.png