我正在尝试创建一个将返回一组带有值的列的查询,这是我目前所获得的,
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║ ║ProgramTypeName║ TypeAmount ║
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║ 1 ║ Center ║ 4 ║
║ 2 ║ School ║ 2 ║
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我从表中获取ProgramTypeName,而TypeAmount,Count(ProgramTypeName)。
我试图达到这一点,
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║ ║Center ║ School ║
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║ 1 ║ 4 ║ 2 ║
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关于我能做些什么来实现这个目标?
@Indian这是我从你的建议中得到的结果,
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║ ║Center ║ School ║
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║ 1 ║ NULL ║ NULL ║
║ 2 ║ NULL ║ NULL ║
║ 3 ║ NULL ║ 2 ║
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正常查询数据时,我有这个,
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║ ║License ║ ProgName ║ Id ║ProgramTypeName ║Amount ║
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║ 1 ║ 45871 ║ TestName ║ 1 ║ Center ║ 4 ║
║ 2 ║ 45871 ║ TestName ║ 1 ║ School ║ 4 ║
║ 3 ║ 45871 ║ TestName ║ 1 ║ Other ║ 2 ║
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答案 0 :(得分:2)
使用conditional Aggregate
将同时适用于Mysql
和Sql Server
select
max(case when ProgramTypeName = 'Center' then TypeAmount END) as Center
max(case when ProgramTypeName = 'School' then TypeAmount END) as School
From (select ProgramTypeName ,Count(ProgramTypeName) from x ...) A
Group by somecol
答案 1 :(得分:1)
我能够使用它,
Select Max(Case When A.ProgName = 'Center' Then TypeAmount End) As Center,
Max(Case When A.ProgName = 'School' Then TypeAmount End) As School,
Max(Case When A.ProgName = 'Other' Then TypeAmount End) As Other
From T_Prog P Inner Join (Select ProgID,
ProgName,
Count(ProgName) As ProgAmount
From T_ProgType_Join PTJ Inner Join T_ProgramType PTJ On PT.ProgramTypeId = PT.ProgramTypeId
Where PTJ.ProgramId = @ProgID
Group by ProgName, ProgID) A On A.ProgID= P.ProgID
Where PTJ.ProgID= @ProgID
答案 2 :(得分:0)
DECLARE @Table TABLE (ProgrameTypeName VARCHAR(20))
INSERT INTO @Table VALUES
('Central'),('Central'),('Central'),('Central')
,('School'),('School')
SELECT *
FROM @Table t
PIVOT (
COUNT(ProgrameTypeName)
FOR ProgrameTypeName
IN ([Central],[School])
)p
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║ Central ║ School ║
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║ 4 ║ 2 ║
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