求一下总记录数,好分页,但是count(*) 要2秒,查询时间记录结果只要0.0044秒解决思路
求一下总记录数,好分页,但是count(*) 要2秒,查询时间记录结果只要0.0044秒
我怎么做,才能提高速度呢?
另外,还想问一个问题,有这样一个需求。
有一统计系统,功能就是统计一下,某个广告一天,有多少个IP点击,一天只记录一个IP,(同个IP点击多次,只记录一次),
到第二天了,才会被在次记录。
每天大约数据量是2千万条,
我想问一下,我怎么设计一下表更合理呢。
------解决方案--------------------
一般来说都用count(1)
------解决方案--------------------
每天0点生成累计数据后 清空数据表...不过清空前考虑做一个压缩拷贝.
------解决方案--------------------
看看这个帖子“
http://www.cnblogs.com/freeliver54/articles/1287312.html
”

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