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判断两条最近数据是否不同，多字段,该如何处理

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Release： 2016-06-13 13:41:39
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判断两条最近数据是否不同，多字段
每天采集数据，想判断两条最近数据是否变动求语句，多字段,mysql

------解决方案--------------------
计算多字段的特征值，例如md5，入库时保存，判断是否唯一

Related labels：
md5 mysql
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