Positively SQL » optimizer http://blog.sqlpositive.com SQL blog by Luke Jian Mon, 21 Nov 2011 22:30:44 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Query optimizer pains http://blog.sqlpositive.com/2009/08/query-optimizer-pains/ http://blog.sqlpositive.com/2009/08/query-optimizer-pains/#comments Wed, 26 Aug 2009 07:41:49 +0000 Luke http://blog.sqlpositive.com/2009/08/query-optimizer-pains/ As requested by Yavor Angelov from MSFT via Twitter im writing down what seem to to be my biggest pains with QO in SqlServer.

1) Whenever you have a a join between large tables QO will look at the indexes that exists on the join keys. If some indexes are missing it seems that the [...]]]> http://blog.sqlpositive.com/2009/08/query-optimizer-pains/feed/ 0