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分享下oracle数据库中update语句更新数据库的例子,有需要的朋友参考下。
在oracle中使用update更新数据。 1,使用表达式更新数据 - update table set column1 = value1,colunm2 = value2 where condition
- update emp set sal = 1900 where ename = 'SCOTT'
- select sal from emp where ename = 'SCOTT'
- update emp set sal = 1800,comm = 234 where ename = 'SCOTT'
- select ename,sal,comm from emp where ename = 'SCOTT'
- select empno,ename,hiredate from emp where empno = 7788
- update emp set hiredate = to_date('1984/01/01','YYYY/MM/DD') where empno =7788
- select empno,ename,hiredate from emp where empno = 7788
复制代码2,使用子查询更新数据 - update emp set comm = 200 where ename = 'SMITH'
- select job,sal,comm from emp where ename = 'SMITH'
- update emp set job = 'CLERK',sal = 2200,comm = 200 where ename = 'SCOTT'
- update emp set (job,sal,comm) = (select job,sal,comm from emp where ename = 'SMITH')where ename = 'SCOTT'
- select ename,job,sal,comm from emp where ename = 'SCOTT'
复制代码
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