InstantForum.NET v2.9.0SQLServerCentralhttp://www.sqlservercentral.com/Forums/notifications@sqlservercentral.comThu, 23 May 2013 21:08:56 GMT20http://www.sqlservercentral.com/Forums/Topic828698-392-1.aspxCross post, please keep to one thread[url]http://www.sqlservercentral.com/Forums/Topic828700-360-1.aspx[/url]Fri, 04 Dec 2009 02:40:10 GMTDave Ballantynehttp://www.sqlservercentral.com/Forums/Topic828698-392-1.aspxI have a query for a report which is basically aggregating some data from different tables as following:/*******************************************************/WITH CAT AS (SELECT DISTINCT c.cat_id, c.name FROM c INNER JOIN pv ON c.cat_id=pv.cat_idWHERE pv.step=1 and c.status=0)SELECT c.name, (select count(1) from p inner join p2p on p.prod_id=p2p.prod_id inner join pv on p2p.path_id = pv.path_id where pv.cat_id=c.cat_id and p.status=0 and p2p.status=0 ) AS 'Total products', (select count(1) from p inner join o on p.product_id=o.product_id inner join p2p on p.prod_id=p2p.prod_id inner join pv on p2p.path_id = pv.path_id where pv.cat_id=c.cat_id and p.status=0 and o.status=0 and p2p.status=0 ) AS 'Total Reviews', (select count(1) from p inner join p2p on p.prod_id=p2p.prod_id inner join pv on p2p.path_id = pv.path_id where pv.cat_id=c.cat_id and p.status=0 and p2p.status=0 and (select count(1) from O where prod_id = p.prod_id and status=0)>1) AS 'Prod. With 1 Review' From CAT c order by c.name/*************************************/as you can see in the above query I am using some common tables again and again for different aggragation purpose like p, p2p,pv are common tables used in all subqueries. As the no of record in each of these tables is very high so the query is running very slow.Can anyone please suggest me how can i optimize this query?Thanks Fri, 04 Dec 2009 02:32:55 GMTmabud_ncc