SQL查询运算符减号不起作用

(SELECT IDOperatore FROM operatore) MINUS 
(SELECT IDOperatore FROM commessaoperatore GROUP BY IDOperatore)

即使我试图用替换MINUS，此查询不起作用。单数查询SELECT IDOperatore FROM operatore和SELECT IDOperatore FROM commessaoperatore GROUP BY IDOperatore正在工作，但如果我尝试将Minus运算符放在一起，则它们不起作用。SQL查询运算符减号不起作用

ERROR: #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'MINUS (SELECT IDOperatore FROM commessaoperatore GROUP BY IDOperatore)' at line 1

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2011-01-21 vankraster

减号不会在MySQL存在

但是你查询你可以使用NOT EXISTS：

SELECT IDOperatore FROM operatore o 
WHERE NOT EXISTS (SELECT 1 
       FROM commessaoperatore c 
       WHERE c.IDOperatore = o.IDOperatore)

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2011-01-21 07:46:59

这是一个正确的答案，谢谢。 – vankraster 2011-01-21 07:49:23

SQL查询运算符减号不起作用

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