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奇思妙想的SQL|去重Cube计算优化新思路
本文主要分享了作者在蚂蚁集团高管数据链路改造升级过程中,针对去重Cube的优化实践。 引言 SQL作为目前最通用的数据库查询语言,其功能和特性复杂度远不止大家常用的“SELECT * FROM tbl”这样简单,一段好的SQL和差的SQL,其性能可能有几十乃至上千倍的差距。
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