Question

Okay so I’ve got 2 table’s

First one is called msg and the other one is msg_t

msg (id, send_type, ..)
msg_t (id, msg_id, send_time)

What I am trying to do is to get all of the msg rows where send_type = 1

and to count the msg_t entries for each msg and group it by month

how can I do that?

Answer 1

SELECT  a.ID, MONTHNAME(b.send_time), COUNT(b.msg_id) totalCount
FROM    msg a
        LEFT JOIN msg_t b
            ON a.ID = b.msg_id
WHERE   a.send_type = 1
GROUP   BY a.ID, MONTH(b.send_time)

• MONTHNAME()
• MONTH()

by using LEFT JOIN, a value of zero will be displayed for msg.ID that have no records on table msg_t