Comments on: Speed Tips For SQL Server SELECT Statements http://www.sql-server-performance.com/2002/speed-select-tips/ SQL Server Performance Tuning Fri, 17 May 2013 13:31:24 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Neeraj tripathi http://www.sql-server-performance.com/2002/speed-select-tips/#comment-958 Neeraj tripathi Mon, 05 Dec 2011 14:24:58 +0000 http://www.sql-server-performance.com/?=186#comment-958 Hi Neil,

Nice article as it gave some more idea about writing queries. But I am amazed to see that in first query group by orderid,orderdate is working fine.
Can you just explain this how this work as there can be more dates for one id.

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