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May 26, 2015
Great article NEW
by: Tammy

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Sep 03, 2010
by: Alf

"DB designed with null issue."


Jul 21, 2010
I don't find this as example of nulls being mandatory
by: Anonymous

Without going into a detailed explanation, you're violating db norms. Work around: First Select the rows that you want to average. After you have those rows then perform the average. Can't select the rows you want? DB designed with null issue.

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