I'm not sure about getting all the dates into a single comma separated
field, if table two had a unique id field, say table2.id then this
should retrieve the last three dates per phone number:
SELECT table1.uid, table1.phone_number, table2.id, table2.date
FROM table1 JOIN table2 ON table1.uid=table2.uid
AND table1.phone_number=table2.phone_number
WHERE table1.uid = 8
AND (table2.id IN
(SELECT id FROM table2
WHERE table2.phone_number = table1.phone_number
ORDER BY table2.date DESC LIMIT 3 ));
--
David Gardner
