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mysql关键字不区分大小写

下列mysql查询是等价的：

mysql>mysql>mysql> SELECT VERSION();+---------------------+| VERSION()           |+---------------------+| 5.0.41-community-nt |+---------------------+1 row in set (0.00 sec)mysql> select version();+---------------------+| version()           |+---------------------+| 5.0.41-community-nt |+---------------------+1 row in set (0.00 sec)mysql> SeLeCt vErSiOn();+---------------------+| vErSiOn()           |+---------------------+| 5.0.41-community-nt |+---------------------+1 row in set (0.00 sec)mysql>
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