Index: trunk/ippTools/share/diffphottool_advance.sql
===================================================================
--- trunk/ippTools/share/diffphottool_advance.sql	(revision 28364)
+++ trunk/ippTools/share/diffphottool_advance.sql	(revision 28365)
@@ -9,3 +9,4 @@
     AND diffSkyfile.quality = 0
 -- WHERE hook %s
+GROUP BY diff_phot_id
 HAVING COUNT(diffPhotSkyfile.skycell_id) = COUNT(diffSkyfile.skycell_id)