Re: SELECT, DISTINCT, and JOIN
Entity-attribute-value (EAV) schemas are nightmares to query---most every query requires that you write a pivot table. And the queries are slow. COnsider abandoning EAV for a more traditional design.
Otherwise see "Pivot tables" at
http://www.artfulsoftware.com/queries.php
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Re: SELECT, DISTINCT, and JOIN
August 28, 2013 04:22PM
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