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mysql透过SUBSTRING_INDEX实现切割

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2016-06-07 16:15:12994browse

mysql通过SUBSTRING_INDEX实现切割 mysql没有直接提供切割的函数.但是我们可以通过SUBSTRING_INDEX来实现. 如 原始字符串: aa.bb.cc.dd SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('aa.bb.cc.dd', '.', 1), '.', -1); 得到aa SELECT SUBSTRING_INDEX(SUBSTRING_

mysql通过SUBSTRING_INDEX实现切割
mysql没有直接提供切割的函数.但是我们可以通过SUBSTRING_INDEX来实现.

如 原始字符串:  aa.bb.cc.dd

SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('aa.bb.cc.dd', '.', 1), '.', -1);  得到aa
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('aa.bb.cc.dd', '.', 2), '.', -1);  得到bb
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('aa.bb.cc.dd', '.', 3), '.', -1);  得到cc
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('aa.bb.cc.dd', '.', 4), '.', -1);  得到dd

看出规律来了吧.
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