下载地址：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
创建表的SQL语句：
create table employees(
emp_no int,
birth_date date,
first_name varchar(14),
last_name varchar(16),
gender enum('M','F'),
hire_date date
);
alter table employees
add constraint emp_key primary key(emp_no);
create table departments(
dept_no char(4),
dept_name varchar(40)
);
alter table departments
add constraint dept_key primary key(dept_no);
create table dept_emp(
emp_no int,
dept_no char(4),
from_date date,
to_date date
);
alter table dept_emp
add constraint dept_emp_key primary key(emp_no,dept_no);
create table dept_manager(
dept_no char(4),
emp_no int,
from_date date,
to_date date
);
alter table dept_manager
add constraint manager_key primary key(emp_no,dept_no);
create table salaries(
emp_no int,
sarary int,
from_date date,
to_date date
);
alter table salaries
add constraint salaries_key primary key(emp_no,from_date);
create table titles(
emp_no int,
title varchar(50),
from_date date,
to_date date
);
alter table titles
add constraint titles_key primary key(emp_no,title,from_date);