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'''Q: What does the [http://dev.mysql.com/doc/refman/5.0/en/join.html straight join ] option do?

''A: In mySQL there is a query optimizer. In a few cases the optimizer puts the queries in the wrong order, so the [http://dev.mysql.com/doc/refman/5.0/en/join.html straight join ] option will processes the queries sequentially and may improve report performance. If adding the straight join option does not improve report performance, it can be left unchecked.