Oracle更新及事物操作

--更新及事物操作

--跟新操作前的准备

create table myemp as select * from emp;

select * from tab;

select * from myemp;

--数据的增加操作

select * from myemp;

desc myemp;

insert into myemp(empno,job,hiredate,ename,mgr,sal,comm,deptno)

values (8888,'CLERK',sysdate,'陈飞鹏',7369,800,100,20);

insert into myemp

values (8899,'软件','MANAGER',7369,to_date('1992-09-12','yyyy-mm-dd'),1000,100,20);

insert into myemp(empno,ename,job,hiredate,sal)

values(6612,'李楠','CLERK',to_date('1989-09-19','yyyy-mm-dd'),600);

insert into myemp

values(6616,'李楠','CLERK',null,to_date('1989-09-19','yyyy-mm-dd'),600,null,null);

select * from myemp where empno in(6612,6616);

insert into myemp(empno,ename,job,mgr,hiredate,sal,comm,deptno)

select * from emp where deptno=20;

insert into myemp select * from emp where deptno=10;

--数据的跟新操作

update myemp set sal=3000,comm=500 where empno=7369;

select * from myemp where empno=7369;

update myemp set sal=sal*1.2

where sal<(select avg(sal) from myemp);

update myemp set sal=0;

rollback;

update myemp set(job,sal,hiredate)=(select job,sal,hiredate from myemp where empno=7839)where empno=7369;

--数据的删除操作

delete from myemp where empno=7566;

select * from myemp where empno=7566;

delete from myemp where deptno=30;

select * from myemp where deptno=30;

delete from myemp where empno in(7369,7566,7788);

select * from myemp;

delete from myemp where sal=(select max(sal) from myemp);

select * from myemp;

delete from myemp myemp where to_char(hiredate,'yyyy')='1987';

select * from myemp;

--事物处理

--锁

select session_id,oracle_username,process from v$locked_object;

commit;

drop table myemp;