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This article mainly introduces the example analysis of join connection in Hive, which has a certain reference value, and interested friends can refer to it. I hope you will gain a lot after reading this article.

Hive's join only supports equivalent connections, and can only use and, not or

Left semi on: the left half join, the filtering of the right table can only be in the join condition, and the columns in the right table cannot appear in select and where, that is, the left half join can only display the data in the left table.

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