如何列名傳遞到子查詢從外部查詢中的Teradata

Question

所以在TSQL，我可以這樣做

select * from tbl1 a 
where a.key1 = (select b.key1 from tbl2 b where a.key1 = b.key1 and a.key2 = b.key2) 

我試圖實施的Teradata相同的概念，但沒有運氣。我如何在teradata中做到這一點？使用WHERE EXISTS

Answer 1

嘗試：

SELECT * 
FROM tbl1 a 
WHERE EXISTS (SELECT b.key1 FROM tbl2b WHERE a.key1 = b.key1 AND a.key2 = b.key2) 

你也可能會得到你想要使用連接的結果：

SELECT a.* 
FROM tbl1 a 
INNER JOIN tbl2 b 
    ON a.key1 = b.key1 
WHERE a.key2 = b.key2