Re: insert only if conditions are met?

On Wed, 2005-08-31 at 12:49 -0400, Henry Ortega wrote:
> Ok. Here's TABLE A
>
> emp date hours type
> JSMITH 08-15-2005 5 WORK
> JSMITH 08-15-2005 3 WORK
> JSMITH 08-25-2005 6 WORK
>
> I want to insert the ff:
> 1.) JSMITH 08-15-2005 8 VAC
> 2.) DOE 08-16-2005 8 VAC
>
> #1 should fail because there is already 8 hours entered as being
> Worked on 08-15-2005 (same date).

sorry, did not notice the duplicates before my previous reply.

you could do something like
insert into A select 'JSMITH','08-15-2005',8,'VAC'
where
8 != (select sum(hours) FROM A
WHERE emp = 'JSMITH'
AND date = '8-15-2005');

gnari