On Monday, October 28, 2013 12:00:41 AM UTC-6, Rajesh wrote:
>
> Hi all,
>
> delete from emp1
> where sal=(select max(sal) from emp1
> group by sal
> having
> count(empno||ename)>1);
>
> I ran the above query and returns an error like this ORA-01427: single-row
>> subquery returns more than one row
>
>
>
>
> Thank you in advanced.
>
>
You are specifically asking for multiple rows from emp given that there is
more than one SAL value that meets that criteria:
SQL> select max(sal) from emp group by sal having count(*) > 1;
MAX(SAL)
----------
1250
3000
SQL>
Michael is correct -- you need to change the '=' to 'in':
SQL> delete from emp
2 where sal=(select max(sal) from emp
3 group by sal
4 having count(empno||ename)>1);
where sal=(select max(sal) from emp
*
ERROR at line 2:
ORA-01427: single-row subquery returns more than one row
SQL>
SQL> delete from emp
2 where sal in (select max(sal) from emp
3 group by sal
4 having count(empno||ename)>1);
4 rows deleted.
SQL>
David Fitzjarrell
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