Difference between Join and Subquery

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Difference between Join and Subquery

Postby coollearner » Fri Feb 03, 2012 12:48 pm

1)How can we decide whether to choose a join or subquery is needed? I mean for what kind of queries a join is recommended and when a subquery is recommended.
2)How can we identify whether a subquery or correlated subquery is needed? I need a thumb rule.
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