MySQL Study之--MySQL工具mysqlshow

梦里梦外; 2022-08-02 12:52 188阅读 0赞

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 <td style="word-wrap:break-word; font-size:14px; line-height:2em"> &nbsp; &nbsp; &nbsp;&nbsp;MySQL Study之--MySQL工具mysqlshow &nbsp; &nbsp; &nbsp; &nbsp;mmysqlshow客户可用来很快地查找存在哪些数据库，数据库中的表，表中的列或索 &nbsp; &nbsp; &nbsp;&nbsp;mysqlshow为一些SQL显示语句提供了一个命令行界面。相同的信息可以通过直接使用那些语句获得。例如，你可以从mysql客户程序发出它们。 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 象这样调用mysqlshow： 
 <blockquote style="word-wrap:break-word; width:797.59375px; background-color:rgb(238,255,238); padding:10px; border:1px solid rgb(102,102,102)">
 shell&amp;gt;&nbsp; 
 mysqlshow[选项] [db_name&nbsp;[tbl_name&nbsp;[col_name]] 
 </blockquote> 
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 <li style="word-wrap:break-word; margin:0px 0px 0px 2em; padding:0px; list-style:disc"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 如果没有给出数据库，显示所有匹配的数据库。 </li> 
 <li style="word-wrap:break-word; margin:0px 0px 0px 2em; padding:0px; list-style:disc"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 如果没有给出表，显示数据库中所有匹配的表。 </li> 
 <li style="word-wrap:break-word; margin:0px 0px 0px 2em; padding:0px; list-style:disc"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 如果没有给出列，显示表中所有匹配的列和列类型。</li> 
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**案例：**

[root@mysrv mysql]# mysqlshow --help
 mysqlshow Ver 9.10 Distrib 5.1.66, for redhat-linux-gnu (x86_64)
 Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
 
 Oracle is a registered trademark of Oracle Corporation and/or its
 affiliates. Other names may be trademarks of their respective
 owners.
 
 Shows the structure of a MySQL database (databases, tables, and columns).
 
 Usage: mysqlshow [OPTIONS] [database [table [column]]]
 
 If last argument contains a shell or SQL wildcard (*,?,% or _) then only
 what's matched by the wildcard is shown.
 If no database is given then all matching databases are shown.
 If no table is given, then all matching tables in database are shown.
 If no column is given, then all matching columns and column types in table
 are shown.
 
 Default options are read from the following files in the given order:
 /etc/mysql/my.cnf /etc/my.cnf ~/.my.cnf 
 The following groups are read: mysqlshow client
 The following options may be given as the first argument:
 --print-defaults Print the program argument list and exit.
 --no-defaults Don't read default options from any option file.
 --defaults-file=# Only read default options from the given file #.
 --defaults-extra-file=# Read this file after the global files are read.
 -c, --character-sets-dir=name 
 Directory for character set files.
 --default-character-set=name 
 Set the default character set.
 --count Show number of rows per table (may be slow for non-MyISAM
 tables).
 -C, --compress Use compression in server/client protocol.
 -#, --debug[=name] Output debug log. Often this is 'd:t:o,filename'.
 --debug-check Check memory and open file usage at exit.
 --debug-info Print some debug info at exit.
 -?, --help Display this help and exit.
 -h, --host=name Connect to host.
 -i, --status Shows a lot of extra information about each table.
 -k, --keys Show keys for table.
 -p, --password[=name] 
 Password to use when connecting to server. If password is
 not given, it's solicited on the tty.
 -P, --port=# Port number to use for connection or 0 for default to, in
 order of preference, my.cnf, $MYSQL_TCP_PORT,
 /etc/services, built-in default (3306).
 --protocol=name The protocol to use for connection (tcp, socket, pipe,
 memory).
 -t, --show-table-type 
 Show table type column.
 -S, --socket=name The socket file to use for connection.
 --ssl Enable SSL for connection (automatically enabled with
 other flags).Disable with --skip-ssl.
 --ssl-ca=name CA file in PEM format (check OpenSSL docs, implies
 --ssl).
 --ssl-capath=name CA directory (check OpenSSL docs, implies --ssl).
 --ssl-cert=name X509 cert in PEM format (implies --ssl).
 --ssl-cipher=name SSL cipher to use (implies --ssl).
 --ssl-key=name X509 key in PEM format (implies --ssl).
 --ssl-verify-server-cert 
 Verify server's "Common Name" in its cert against
 hostname used when connecting. This option is disabled by
 default.
 -u, --user=name User for login if not current user.
 -v, --verbose More verbose output; you can use this multiple times to
 get even more verbose output.
 -V, --version Output version information and exit.
 
 Variables (--variable-name=value)
 and boolean options {FALSE|TRUE} Value (after reading options)
 --------------------------------- -----------------------------
 character-sets-dir (No default value)
 default-character-set latin1
 count FALSE
 compress FALSE
 debug-check FALSE
 debug-info FALSE
 host (No default value)
 status FALSE
 keys FALSE
 port 3306
 show-table-type FALSE
 socket /tmp/mysql.sock
 ssl FALSE
 ssl-ca (No default value)
 ssl-capath (No default value)
 ssl-cert (No default value)
 ssl-cipher (No default value)
 ssl-key (No default value)
 ssl-verify-server-cert FALSE
 user (No default value)

1、不指定查看的database

3、查看指定