Re: insert only if conditions are met?

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).

Any suggestions?

On 8/31/05, Ragnar Hafstað <gnari(at)simnet(dot)is> wrote:
>
> On Wed, 2005-08-31 at 11:49 -0400, Henry Ortega wrote:
> > What I am trying to do is
> > * Insert a record for EMPLOYEE A to TABLE A
> > IF
> > the sum of the hours worked by EMPLOYEE A on TABLE A
> > is not equal to N
> >
> > Is this possible?
>
> Sure, given a suitable schema
>
> It is not clear to me, if the hours worked are
> to be found in the same table you want to insert
> into, or not.
>
> gnari
>
>
>
>