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mysql中的leftjoin,rightjoin_MySQL

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Release： 2016-06-01 12:59:03
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left (outer) join:左表为主，包含左表的所有行，右表满足记录的数据列出

right (outer) join:右表为主，包含右表的所有行，左表满足记录的数据列出

cross join:笛卡尔积（所有可能的行组合）。

inner join:满足连接条件的cross组合。

full outer join:left outer 和 right outer所有行的超集。

Related labels：
mysql中的leftjoin rightjoin
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