Στις Τρίτη 26 Ιούνιος 2007 12:44, ο/η Michael Landin Hostbaek έγραψε: > A. Kretschmer (andreas.kretschmer) writes: > > *untested* > > > > select cid, sum(case when click = true then 1 else 0 end), sum(case when > > view = true then 1 else 0 end) from ... > > Thanks, but I need the DISTINCT contactid - I don't want the same > contactid counted twice. >
Something like SELECT distinct cid,(select count(distinct t1.contactid) from tracking t1 where t1.view and t1.cid=tglob.cid) as countviews,(select count(distinct t2.contactid) from tracking t2 where t2.click and t2.cid=tglob.cid) as countclicks from tracking tglob; ? > Mike > > ---------------------------(end of broadcast)--------------------------- > TIP 6: explain analyze is your friend -- Achilleas Mantzios ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
