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Posted by:
paolo tome
Date: January 30, 2012 03:16AM
Hello everyone!
I hope that someone wants to share with me a funny query whose behavior is unnerve me for several days.
Link to the query (www.edulink.uniud.it/query.sql) and db with the main tables (www.edulink.uniud.it/diagramma-db.pdf)
the thing that eludes me is why the query stops working (it runs indefinitely without giving results or errors - EXPLAIN also has the same behavior) if there are WHERE conditions among the fields of the last table (t_reperto_micro) .....
anyone can give me some suggestions?
I thank anyone who can help me!
Paolo
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