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Question

有人可以帮助解决以下的hive查询。我知道下面的内容不会起作用，因为hive不支持非equi连接。

SELECT a.ymd, a.price_close, b.price_close
FROM   stocks a 
JOIN   stocks b ON a.ymd <= b.ymd
WHERE  a.symbol = 'AAPL' AND b.symbol = 'IBM';

Answer 1

您可以交叉加入然后过滤：

SELECT a.ymd, a.price_close, b.price_close
FROM   
    (select a.ymd, a.price_close from stocks a where a.symbol = 'AAPL') a
CROSS JOIN (select b.ymd, b.price_close from stocks b where b.symbol = 'IBM') b
WHERE a.ymd <= b.ymd;