RE: [Q] SQLPLUS help on "distinct"

GROUP BY does not necessarily guarantee a sort.

eg. you still need an ORDER BY

On Fri, 2003-08-29 at 07:59, Mercadante, Thomas F wrote:
> Mike,
>
> Add a GROUP BY command:
>
> select distinct (rpad(employee_id,6,' ')) ||';'|| ssn
> from EMP
> group by (rpad(employee_id,6,' ')) ||';'|| ssn
>
> Hope this helps.
>
> Tom Mercadante
> Oracle Certified Professional
>
>
> -----Original Message-----
> Sent: Friday, August 29, 2003 10:45 AM
> To: Multiple recipients of list ORACLE-L
>
>
> I have problem to use "distinct" with Function on
> select statement. Can anyone give me a hint?
>
> Thanks.
>
> SQL> select distinct (rpad(employee_id,6,' ')) ||';'||
> ssn from EMP
> 2 order by employee_id;
> select distinct (rpad(employee_id,6,' ')) ||';'|| ssn
> from EMP
> *
> ERROR at line 1:
> ORA-01791: not a SELECTed expression
>
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