Select values that meet different conditions on different rows?

Question

This is a very basic query I can\'t figure out....

Let\'s say I have a two column table like this:

userid  |  roleid
--------|--------
   1    |    1         


        

Answer 1

Assuming userid, roleid are contained in a unique index (meaning there cannot be 2 records where userid = x and roleid = 1

select count(*), userid from t
where roleid in (1,2,3)
group by userid
having count(*) = 3