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判断两条最近数据是否不同,多字段,该如何处理

WBOY
WBOYOriginal
2016-06-13 10:09:46846browse

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

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