Re: Different data types
It's the Entity-Attribute-Value (EAV) data model. Queries on it are brutal to write, brutal to debug because non-trivial queries turn out to require complicated "pivot" table designs (there's an elementary example under "pivot table basics" at
http://www.artfulsoftware.com/queries.php), and their performance is often unacceptably slow. So it may be worth your while to switch to traditional SQL design, ie literal column specs and enough extra columns to accommodate future column specs.
PB
http://www.artfulsoftware.com
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Re: Different data types
August 17, 2010 01:19PM
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