Mike,
> select frienda, friendb from friends where (select
> schools.school from friends,schools where friends.frienda =
> schools.person) = (select schools.school from friends,schools where
> friends.friendb = schools.person);
Too complicated. You need to learn how to use JOINS and table aliases
(or find yourself some friends who know SQL!):
SELECT friends.frienda, friends.friendb
FROM friends JOIN schools schoola ON friends.frienda = schoola.person
JOIN schools schoolb ON friends.friendb = schoolb.person
WHERE schoola.school = schoolb.school
and, if it's possible that any particular person went to more than one
school, add:
GROUP BY frienda, friendb
Simple, neh?
-Josh
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