非Equi加入hIve

Question

有人可以幫助下面的蜂巢查詢。我知道下面不會工作，因爲配置單元不支持non equi連接。

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

可以交叉連接，然後過濾：

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;