Re: Server just hanging (Copying to tmp table)
Posted by:
Jay Pipes
Date: December 15, 2005 02:14PM
Not a big deal. The best explanation I can give for when to use a LEFT JOIN is the following:
Use a left join when you have two sets of data, say set A and set B, that are related through some common field(s), and you want to have *all* rows of set A appear in your final result *regardless* of whether there is a matching row in set B. The "left" part of LEFT JOIN simply means the table (or dataset) on the *left* side of the ON expression, that's all.
HTH, and good to see everything's working OK.
Jay Pipes
Community Relations Manager, North America, MySQL Inc.
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Re: Server just hanging (Copying to tmp table)
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