select last message of conversation for each conversation in mysql

Question

my query:

SELECT *
  FROM messages_status mst
       INNER JOIN messages msg 
             ON mst.msg_id=msg.id
 WHERE mst.user_id = 1 
       AND mst.status         


        

Answer 1

As you asked get the last message of each conversation You may try this

select *
from messages msg
inner join
(
  select max(created_at) created_at
  from messages
  group by conv_id
) m2
  on msg.created_at = m2.created_at

Inner JOIN messages_status mst ON msg.id=mst.msg_id 
WHERE mst.user_id = 1 AND mst.status NOT IN (0,3)

http://sqlfiddle.com/#!2/be010/89