SQL查詢運算符減號不起作用

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

即使我試圖用替換MINUS，此查詢不起作用。單數查詢SELECT IDOperatore FROM operatore和SELECT IDOperatore FROM commessaoperatore GROUP BY IDOperatore正在工作，但如果我嘗試將Minus運算符放在一起，則它們不起作用。SQL查詢運算符減號不起作用

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

減號不會在MySQL存在

但是你查詢你可以使用NOT EXISTS：

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

來源

2011-01-21 07:46:59

這是一個正確的答案，謝謝。 – vankraster 2011-01-21 07:49:23

SQL查詢運算符減號不起作用

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