Robert DiFalco wrote
> For 2 arbitrary ids, I need a query to get two pieced of data:
> * Are the two users friends?
This seems easy...ROW(u_id, f_id) = ROW(n1, n2)
> * How many friends do the two users have in common.
SELECT f_id FROM [...] WHERE u_id = n1
INTERSECT
SELECT f_id FROM [...] WHERE u_id = n2
Put those into WITH/CTE and use the main query to combine them in whatever
way seems appropriate.
David J.
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