I have query
SELECT helpc.cid, COUNT(help.cid) AS children_count FROM air_help_category AS helpc LEFT JOIN air_help AS help ON helpc.cid = help.cid GROUP BY cid WHERE hildren_count > 0
but I get
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE children_count > 0 LIMIT 0, 30' at line 1`
Checked the coresponding error code, but still could not fix this.
All I'm trying to achieve is to get those ids, who have at least one children.
First of all, WHERE
clause should go before GROUP BY
. Also, you can't use aggregate field values for WHERE
- use HAVING
instead, like this:
SELECT helpc.cid, COUNT(help.cid) AS children_count
FROM air_help_category AS helpc LEFT JOIN air_help AS help ON helpc.cid = help.cid
GROUP BY cid
HAVING COUNT(help.cid) > 0