PHP查询MYSQL中某字段值内某段文字出现的个数
我有一张MYSQL表,名字为:name , 里面有个字段为 caozuo ,还有的字段为:zhuangtai
其中,caozuo 字段内,是对改行数据的一个操作情况,现在因为业务需要,需要统计操作3次以下的数据量!
这就需要查询caozuo 字段内,某一段文字出现的个数了,因为前台业务的原因,每次操作改行,caozuo 字段内都会插入一些备注,但是都有统一的一段格式的文字,该段格式为:
----【编辑时间:2012-09-24 11:11:42】---- 但是 格式是一定的,内容是不一样的! 编辑时间是自动插入的! 简单来说,我需要一个查询语句,统计:
查询数据库内,在zhuangtai 为 1 的 caozuo字段内 出现“编辑时间”少于3次的行数
不知道怎么查询呢?
回复讨论(解决方案)
计算 caozuo字段内 出现“编辑时间”的次数
(length(caozuo) - length(replach(caozuo, '', '编辑时间'))) / length('编辑时间')
这个算式应该不难理解吧?
有了这个,接下来就不难了
select * from name where zhuangtai='1' and (length(caozuo) - length(replach(caozuo, '', '编辑时间'))) / length('编辑时间')

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