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新增IP数是怎么求的呢

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Release: 2016-06-13 12:30:04
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新增IP数是如何求的呢?
比如;
表中已有IP数1000W条,今天有100W条IP访问,
求今天的新增IP数,如何快速求出呢


我想 大概是将今天这100W条IP逐个和已存在的1000W条IP比对,如果有重复的就删减,最后得到的就是新增的IP。这样可能会卡死,如何快速做到呢。

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