Question

My first table is as below (not important):

tbl_Item

ItemId,ItemName
1     ,'test'
2     ,'test2'
3     , 'test3'

and second table is (Important table),this table tell us that ItemId has what specifications? For example ItemId 1 has specs 5 and 6 and 7

tbl_Spec

ItemId , SpecId
1      ,5
1      ,6
1      ,7
2      ,5
2      ,8
3      ,5
3      ,7

How can I select Items that have both SpecId 5 and 7

the result must be :

ItemId
1
3

SQL In (…) do the OR as default, but I want something with And Function.

My DBMS is SQL Server 2008

Answer 1

I’m sure there must be more elegant ways, but this should give you what you want (EDIT: fixed as per Michaeł Powaga’s suggestion).

SELECT ItemId
FROM tbl_Spec
WHERE SpecId=5 OR SpecId=7
GROUP BY ItemId
HAVING COUNT(DISTINCT SpecId)=2

p.s. Ali , if you need a more easily expandable solution, have you seen Mikael Eriksson’s answer?