新手问题 Select TOP n rows form each group

shawnyu · October 27, 2014 · Last by hooopo replied at October 27, 2014 · 1587 hits

怎么解决这个问题

mysql 查起来很慢。 Redis 模型太复杂了,而且还不好更新 关键是数据量没法控制 mongodb 的 Map/Reduce 据说很慢?

来讨论下 查询要实时。

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