http://www.sql-server-performance.com/2007/nonclustered-indexes/ SQL Server Performance Tuning Fri, 17 May 2013 13:31:24 +0000 hourly 1 http://wordpress.org/?v=3.5.1 http://www.sql-server-performance.com/2007/nonclustered-indexes/#comment-1021 Naveen Kumar Thu, 15 Dec 2011 06:26:44 +0000 http://www.sql-server-performance.com/?=211#comment-1021 Hi,
The above query when executed does not give a selectivity ratio in %. Please add ROUND((SELECT @total_unique/@total_rows*100),2,2) instead of ROUND((SELECT @total_unique/@total_rows),2,2)

]]> http://www.sql-server-performance.com/2007/nonclustered-indexes/#comment-577 Rakesh Thu, 01 Sep 2011 14:12:06 +0000 http://www.sql-server-performance.com/?=211#comment-577 Hi – selectivity of a column is misleading. I did a simple check on one of my PROD DB’s which had 0.12 selectivity ratio(result of your script), but when i saw the actual execution plan when i do a simple select on the column, the plan is using the non clustered index unlike what you’ve suggested..

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