On 8/11/2010 12:27 PM, nan wich wrote:
> I'm havng trouble getting my head around converting this to a count
> query for doing a pager_query.
>
> SELECT c.name, c.mail, COUNT(*) AS num, pv.value AS usertype, td.name AS
> role
> FROM {comments} c
> INNER JOIN {node} n ON n.nid=c.nid
> INNER JOIN {term_node} tn ON tn.nid=n.nid AND tn.vid=n.vid
> INNER JOIN {term_data} td ON td.tid=tn.tid AND td.vid = 2
> LEFT JOIN {profile_values} pv ON pv.uid=c.uid AND pv.fid = 13
> WHERE c.mail <> ''
> GROUP BY role, c.mail ORDER BY num DESC
You can almost always do:
SELECT COUNT(*) as expression FROM (SELECT ...);
Drop the ORDER BY and any fields that you don't need from the query (you
need the group by fields) and you'll be okay.
