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  • Committer: Mark Atwood
  • Date: 2011-12-11 22:56:39 UTC
  • mfrom: (2465.1.1 drizzle)
  • Revision ID: me@mark.atwood.name-20111211225639-3d8ype7g2y82dci5
merge lp:~brianaker/drizzle/libdrizzle-breakout

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docs/join.rst
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Join
 
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JOIN
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====
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The JOIN keyword is used in an SQL statement to query data from two or more tables, based on a relationship between certain columns in these tables.
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.. note::
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   Implicit cartesian products of the form ``SELECT * FROM t1, t2`` without a ``WHERE`` or ``ON`` condition will error. If such behavior is intended please use ``SELECT * FROM t1 CROSS JOIN t2``.
 
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   Implicit cartesian products of the form ``SELECT * FROM t1, t2``
 
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   without a ``WHERE`` or ``ON`` condition will error. If such
 
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   behavior is intended please use ``SELECT * FROM t1 CROSS JOIN t2``.
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How joins are executed