Comments on: SQL Server 2005 query to get the average http://itknowledgeexchange.techtarget.com/itanswers/mssql-query-to-get-the-average/ Sat, 25 May 2013 23:02:16 +0000 hourly 1 By: kccrosser http://itknowledgeexchange.techtarget.com/itanswers/mssql-query-to-get-the-average/#comment-60292 kccrosser Tue, 24 Feb 2009 18:38:32 +0000 #comment-60292 Are you asking for a “statement” that sets the third column value to the average of the other two columns? That isn’t a “query” – you need to use an Update statement:

update mytable set column3 = (column1 + column2)/2;

A query does not change the values in the underlying tables.

Note – you may want to look at functions like “Round” or “Floor” if you want the average to be of a specified precision, or an integer value.

update mytable set column3 = round((column1+column2)/2, 2);

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