servlet03 汾 
 create database web;
use web;
create table t_emp(
    empno int auto_increment primary key,
    ename varchar(100),
    mgr int,
    deptno int,
    hiredate datetime,
    salary double,
    comm double
);

insert into t_emp (empno, ename, mgr, deptno, hiredate, salary, comm)
values (null, 'Tom', 0, null, now(), 1000, 200);

insert into t_emp (empno, ename, mgr, deptno, hiredate, salary, comm)
values (null, 'Jerry', 1, null, now(), 2000, 100);