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mysql截取的字符串函数substring_index的用法_MySQL

WBOY
WBOYOriginal
2016-06-01 13:06:011128browse

截取的字符串为15,151,152,16',可以看作是ip吧(虽然这里指的不是iP),

然后要截取每个逗号之前那部分

以下的意思是:在字符串中以逗号为索引,获取不同索引位的字符

结果如下:

SELECT SUBSTRING_INDEX('15,151,152,16',',',1); ==>得到结果为: 15
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('15,151,152,16',',',2),',',-1);==>得到结果为: 151
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('15,151,152,16',',',-2),',',1);==> 得到结果为:152
SELECT SUBSTRING_INDEX('15,151,152,16',',',-1);==>得到结果为: 16

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