mysql示例employees数据库

Bertha 。 2024-02-18 20:40 45阅读 0赞

供练习sql使用。MySQL同样提供了employees数据库，但并未随数据库一起安装，其下载链接也极其隐蔽，可能导致许多人没注意到。

下载地址：[https://launchpad.net/test-db/employees-db-1/1.0.6][https_launchpad.net_test-db_employees-db-1_1.0.6]

建议大家下载：employees\_db-full-1.0.6.tar.bz2，解压缩，进入目录，并导入。

tar -xjf $HOME/Downloads/employees\_db-full-1.0.4.tar.bz2  
//解压缩，进入目录  
cd employees\_db/  
//导入数据库root为用户名  
mysql -t -u root -p < employees.sql

root@storm-master-01:/home/employees\_db\#mysql -h ip -t -u username -p password -P3306 < employees.sql   
mysql: \[Warning\] Using a password on the command line interface can be insecure.  
\+-----------------------------+  
| INFO |  
\+-----------------------------+  
| CREATING DATABASE STRUCTURE |  
\+-----------------------------+  
\+---------------------+  
| INFO |  
\+---------------------+  
| LOADING departments |  
\+---------------------+  
\+-------------------+  
| INFO |  
\+-------------------+  
| LOADING employees |  
\+-------------------+

ERROR 2006 (HY000) at line 1 in file: 'load\_employees.dump': MySQL server has gone away

###### MySQL max\_allowed\_packet设置及问题 ######

### 1、修改mysqld的配置文件my.cnf ###

调整`max_allowed_packet`的值，修改为5M就比较合适了。

[mysqld]
    port        = 3308
    socket      = /dev/shm/mysqld.sock
    skip-external-locking
    key_buffer_size = 16M
    max_allowed_packet = 10M
    table_open_cache = 64
    sort_buffer_size = 512K
    net_buffer_length = 8K
    read_buffer_size = 256K
    read_rnd_buffer_size = 512K
    myisam_sort_buffer_size = 8M

### 2、修改`[mysqld]`中的值 ###

[mysqldump]
    quick
    max_allowed_packet = 10M

By default this is relatively small.

You can increase, for example to 16M with:

附件

create table emp (
        empno numeric(4) not null,
        ename varchar(10),
        job varchar(9),
        mgr numeric(4),
        hiredate datetime,
        sal numeric(7, 2),
        comm numeric(7, 2),
        deptno numeric(2)
    );
    
    insert into emp values (7369, 'SMITH', 'CLERK', 7902, '1980-12-17', 800, null, 20);
    insert into emp values (7499, 'ALLEN', 'SALESMAN', 7698, '1981-02-20', 1600, 300, 30);
    insert into emp values (7521, 'WARD', 'SALESMAN', 7698, '1981-02-22', 1250, 500, 30);
    insert into emp values (7566, 'JONES', 'MANAGER', 7839, '1981-04-02', 2975, null, 20);
    insert into emp values (7654, 'MARTIN', 'SALESMAN', 7698, '1981-09-28', 1250, 1400, 30);
    insert into emp values (7698, 'BLAKE', 'MANAGER', 7839, '1981-05-01', 2850, null, 30);
    insert into emp values (7782, 'CLARK', 'MANAGER', 7839, '1981-06-09', 2450, null, 10);
    insert into emp values (7788, 'SCOTT', 'ANALYST', 7566, '1982-12-09', 3000, null, 20);
    insert into emp values (7839, 'KING', 'PRESIDENT', null, '1981-11-17', 5000, null, 10);
    insert into emp values (7844, 'TURNER', 'SALESMAN', 7698, '1981-09-08', 1500, 0, 30);
    insert into emp values (7876, 'ADAMS', 'CLERK', 7788, '1983-01-12', 1100, null, 20);
    insert into emp values (7900, 'JAMES', 'CLERK', 7698, '1981-12-03', 950, null, 30);
    insert into emp values (7902, 'FORD', 'ANALYST', 7566, '1981-12-03', 3000, null, 20);
    insert into emp values (7934, 'MILLER', 'CLERK', 7782, '1982-01-23', 1300, null, 10);
    
    create table dept (
        deptno numeric(2),
        dname varchar(14),
        loc varchar(13)
    );
    
    insert into dept values (10, 'ACCOUNTING', 'NEW YORK');
    insert into dept values (20, 'RESEARCH', 'DALLAS');
    insert into dept values (30, 'SALES', 'CHICAGO');
    insert into dept values (40, 'OPERATIONS', 'BOSTON');
    
    create table bonus (
        empno numeric(4),
        job varchar(9),
        sal numeric,
        comm numeric
    );
    
    create table salgrade (
        grade numeric,
        losal numeric,
        hisal numeric
    );
    
    insert into salgrade values (1, 700, 1200);
    insert into salgrade values (2, 1201, 1400);
    insert into salgrade values (3, 1401, 2000);
    insert into salgrade values (4, 2001, 3000);
    insert into salgrade values (5, 3001, 9999);

[https_launchpad.net_test-db_employees-db-1_1.0.6]: https://launchpad.net/test-db/employees-db-1/1.0.6