新增IP数是怎么求的呢
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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