目前hive不支持 in或not in 中包含查询子句的语法，所以只能通过left join实现。

假设有一个用户浏览商品表skim,和一个用户购买商品表buy。如下

skim表

buy表

select * from skim left outer join buy
on skim.userId = buy .userId and skim.itemId = buy .itemId
结果如下：

IN

如果要查询在skim表中并且也在buy表中的信息，需要用in查询，hive sql如下:

select skim.userId , skim.itemId from skim left outer join buy
on skim.userId = buy .userId and skim.itemId = buy .itemId where buy .userId is not null;

结果如下:

NOT IN

如果要查询在skim表中并且不也在buy表中的信息，需要用not in查询，hive sql如下:

select skim.userId, skim.itemId from skim left outer join buy
on skim.userId=buy .userId and skim.itemId=buy .itemId where buy .userId is null;

结果如下：