我需要进行类似的查询:
SELECT DISTINCT Carta_ID
FROM Carta_Alarme
INNER JOIN Alarme ON Carta_Alarme.Alarme_ID = Alarme.ID
WHERE (
YEAR( Alarme.dtOcorrencia ) = 2011
) NOT
IN (
SELECT DISTINCT Carta_ID
FROM Carta_Alarme
INNER JOIN Alarme ON Carta_Alarme.Alarme_ID = Alarme.ID
WHERE (
YEAR( Alarme.dtOcorrencia ) = 2012
)
)
首先选择的结果是(1,5,6)。 “NOT IN”之后的另一个选择的结果是(1,2,3,4,5),但总查询的结果是(1,2,3,4,5),我只需要(6)。
所以我需要的是这个选择之间的区别,我得到的是INTERSECT
答案 0 :(得分:2)
SELECT DISTINCT Carta_ID
FROM Carta_Alarme
INNER JOIN Alarme ON Carta_Alarme.Alarme_ID = Alarme.ID
WHERE (
YEAR( Alarme.dtOcorrencia ) = 2011
) AND Carta_ID NOT
IN (
SELECT DISTINCT Carta_ID
FROM Carta_Alarme
INNER JOIN Alarme ON Carta_Alarme.Alarme_ID = Alarme.ID
WHERE (
YEAR( Alarme.dtOcorrencia ) = 2012
)
)
答案 1 :(得分:1)
SELECT Carta_ID
FROM Carta_Alarme
INNER JOIN Alarme ON Carta_Alarme.Alarme_ID = Alarme.ID
GROUP BY Carta_ID
HAVING sum(YEAR(Alarme.dtOcorrencia) = 2011) > 0
and sum(YEAR(Alarme.dtOcorrencia) = 2012) = 0
答案 2 :(得分:0)
这实际上是minus set operation
SELECT DISTINCT ca.Carta_ID
FROM Carta_Alarme ca
INNER JOIN Alarme a ON ca.Alarme_ID = a.ID
left join (SELECT DISTINCT Carta_ID
FROM Carta_Alarme
INNER JOIN Alarme ON Carta_Alarme.Alarme_ID = Alarme.ID
WHERE YEAR( Alarme.dtOcorrencia ) = 2012) ca2 on ca2.Carta_id = ca.Carta_id
WHERE YEAR( a.dtOcorrencia ) = 2011
and ca2.Carta_id is null