How to get the latest record in each group using GROUP BY? [duplicate]
You should find out last timestamp values in each group (subquery), and then join this subquery to the table -
SELECT t1.* FROM messages t1 JOIN (SELECT from_id, MAX(timestamp) timestamp FROM messages GROUP BY from_id) t2 ON t1.from_id = t2.from_id AND t1.timestamp = t2.timestamp;
Try this
SELECT * FROM messages where id in (SELECT max(id) FROM messages GROUP BY from_id ) order by id desc
this query return last record for every Form_id:
SELECT m1.* FROM messages m1 LEFT JOIN messages m2 ON (m1.Form_id = m2.Form_id AND m1.id < m2.id) WHERE m2.id IS NULL;