Question

我必须使用单个sql查询更新薪水为0的员工的薪水为1000，而不是0乘500。我们怎么做到这一点。请建议。

Answer 1

You can try following query:-

UPDATE your_table 
SET salary = CASE  WHEN (salary = 0)  THEN salary + 1000   
                  WHEN (salary > 0)  THEN salary + 500 END

Hope this helps you.

Answer 2

create table emp
(id number,
 sal number
 );

 insert into emp values (1,0);
 insert into emp values (2,10);
 insert into emp values (3,0);
 insert into emp values (4,-1);

update emp
set sal = case when sal = 0 Then 1000
               when sal != 0 Then 500
           END

Second condition put it as !=0 by assuming it can be either greater or less or null Hope this help. Next time show your effort also.

使用单个sql语句更新表中的两个不同工资（值）

2 个答案: