Re: Help to simplify sample query

Tomasz Myrta wrote:

>
> Can you try this query ? :
>
> select cd_area from area a1
>  join teacher_course c2 using (cd_course)
> where (cd_teacher,cd_course) in (select 1,2 union select 98,45 union 
> select 11,0);
   Tomasz, the "in" in the query above will work like an "or" 
((cd_teacher=1,cd_course=2) or (cd_teacher=98,cd_course=45) or 
(cd_teacher=11,cd_course=0)) but i need an "and" behaviour (because of 
this i was using some exists/ands)...

Thanks for your reply.