Re: in clause problem

Hi,

georg_gruber_at_web.de wrote:
>
> hi, my name is Georg Gruber and this is my first posting to this
> newsgroup.
>
> i hope i'm right here with my question.
>
> i have the following problem...
>
> there are three tables
> C (id, name)
> M (id, name)
> R (id, ref_c_id, ref_m_id)
>
> Values are:
> C
> ----
> 1, C1
> 2, C2
> 3, C3
>
> M
> ----
> 1, M1
> 2, M2
> 3, M3
> 4, M4
> 5, M5
>
> R
> ----
> 1, 1, 1
> 2, 1, 2
> 3, 1, 3
> 4, 2, 2
> 5, 2, 3
> 6, 3, 3
> 7, 3, 4
> 8, 4, 5
>
> Now i want to select via multiple choise from table M some values
> and get exactly the name from the according data from table T.
>
> For example:
> i want to get all entries from table T when the have M2 AND M3 set in R.
> result would be: 1, 2 but not 3 because i doesn't have M2.
>
> i tried IN CLAUSE but this won't work right because IN makes a logical OR.
>
> does anybody know a good answer? do i have to build subqueries or temporary
> tables or something?

Post what you have so far, and people can criticise it (in a positive sense). Perhaps you have applied the IN to the wrong columns.

This sounds a lot like homework though. Received on Mon Apr 23 2001 - 14:24:00 CEST