Question

如何合并两个SQL查询的结果？

首次查询：

Select T.NUM1,T.AM1
FROM
(
    Select Number AS NUM1,SUM(AMOUNT) As AM1 FROM TBLSALES WHERE NUMBER<20 GROUP BY NUMBER
)T

第二个查询

SELECT B.NUM2,B.AM2
FROM
(
    SELECT Number AS NUM2,SUM(AMOUNT) As AM2 FROM TBLSALES WHERE NUMBER>19 AND NUMBER<40 GROUP BY NUMBER
)B

Answer 1

只要列数和类型的数目相同，UNION或UNION ALL就应该起作用。

Select T.NUM1 as NUM,T.AM1 as AM
FROM
(
    Select Number AS NUM1,SUM(AMOUNT) As AM1 FROM TBLSALES WHERE NUMBER<20 GROUP BY NUMBER
)T

UNION

SELECT B.NUM2 as NUM,B.AM2 as AM
FROM
(
    SELECT Number AS NUM2,SUM(AMOUNT) As AM2 FROM TBLSALES WHERE NUMBER>19 AND NUMBER<40 GROUP BY NUMBER
)B

Answer 2

您可以使用UNION合并查询结果。如果要避免重复记录，则应使用UNION；如果不想排除重复结果，则在这种情况下应使用UNION ALL。

如何合并两个SQL查询的结果？

2 个答案: