oracle中操作数据

使用特定格式插入日期值

insert into emp 
values
(7950,'ZHANGSAN','MANAGER','7782',
to_date('1988-11-11','yyyy-mm-dd'),
1200.00,50.00,10);

insert into emp 
values
(7951,'ZHANGSAN','MANAGER','7782',to_date('1988/11/11','yyyy/mm/dd'),
1200.00,50.00,10);

 

 使用子查询插入数据

create table myemp
(
    myId number(4),
    myName varchar2(50),
    myDept number(5)
);

insert into myemp(myId,myname,mydept) 
select empno,ename,deptno from emp 
where deptno = 10;

select * from myemp;

 使用子查询更新数据

update emp set (job,sal,comm) 
= (select job,sal,comm from emp where ename='SMITH') 
where ename = 'SCOTT';