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[Hadoop大数据]——Hive连接JOIN用例详解

SQL里面通常都会用Join来连接两个表，做复杂的关联查询。比如用户表和订单表，能通过join得到某个用户购买的产品；或者某个产品被购买的人群.... Hive也支持这样的操作，而且由于Hive底层运行在hadoop上，因此有很多地方可以进行优化。比如小表到大表的连接操作、小表进行缓存、大表进行避免...

Hive连接JOIN用例详解（转载）

转自： https://my.oschina.net/iamchenli/blog/845850 http://www.cnblogs.com/xing901022/p/5804836.html

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更新时间 2024-02-14 09:16:45

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开源大数据平台 E-MapReduce

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