1

我一直在阅读 PIVOT 和 UNPIVOT，但无法正确格式化结果以呈现数据。这是我的源表：

StepID         |      ShortDesc     |     Type_1        |      ar1      |    ar2
   1                  ShortDesc1            10                11.11         11.01
   2                  ShortDesc2            20                22.22         22.02
   3                  ShortDesc3            30                33.33         33.03
   4                  ShortDesc4            40                44.44         44.04
   5                  ShortDesc5            50                55.55         55.05

这是我试图达到的结果：

 |      Step1       |       Step2     |      Step3     |     Step4      |     Step5
      ShortDesc1         ShortDesc2       ShortDesc3      ShortDesc4        ShortDesc5
         10                 20                30              40               50
        11.11             22.22             33.33            44.44           55.55
        11.01             22.02             33.03            44.04           55.05

这是我尝试过的最新方法，当然没有用：

DROP TABLE ProductionTest
CREATE TABLE ProductionTest (StepID int, ShortDesc nvarchar(25), Type_1 int, ar1 real, ar2 real)
INSERT INTO ProductionTest  VALUES (1, 'Short Desc 1', 10, 11.11, 11.01)
INSERT INTO ProductionTest  VALUES (2, 'Short Desc 2', 20, 22.22, 22.02)
INSERT INTO ProductionTest  VALUES (3, 'Short Desc 3', 30, 33.33, 33.03)
INSERT INTO ProductionTest  VALUES (4, 'Short Desc 4', 40, 44.44, 44.04)
INSERT INTO ProductionTest  VALUES (5, 'Short Desc 5', 50, 55.55, 55.05)

SELECT * FROM ProductionTest

SELECT [1]as Step1, [2] as Step2, [3]as Step3, [4]as Step4, [5]as Step5
FROM     ( SELECT [StepID], ShortDesc, Type_1, ar1, ar2
           FROM   ProductionTest) p 
PIVOT (MAX(ShortDesc)
                     FOR StepID IN ([1], [2], [3], [4], [5])
       ) AS pvt

谢谢你的帮助！

4

2 回答 2

0

根据您希望通过动态版本执行此操作的评论。您可以将 Martin 的版本用于静态版本，但如果您想要动态版本，这意味着数量StepID's会发生变化，那么您可以执行以下操作：

DECLARE @cols AS NVARCHAR(MAX),
    @colsAlias AS NVARCHAR(MAX),
    @query  AS NVARCHAR(MAX);

select @cols = STUFF((SELECT distinct ',' + QUOTENAME(StepID) 
                    from ProductionTest
            FOR XML PATH(''), TYPE
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'')

SELECT @colsAlias = STUFF((SELECT DISTINCT ',' + QUOTENAME(p.StepID) + ' AS ' + QUOTENAME('Step' + Cast(p1.StepID as varchar(10)))  
    FROM ProductionTest p INNER JOIN ProductionTest p1 ON p.StepID = p1.StepID
    FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,1,'')


set @query = 'SELECT ' + @colsAlias + ' from 
             (
                 select [StepID], ShortDesc
                 FROM   ProductionTest
            ) x
            pivot 
            (
                MAX(ShortDesc)
                for stepId in (' + @cols + ')
            ) p 
            UNION ALL
            SELECT ' + @colsAlias + ' from 
             (
                 select [StepID], CAST(Type_1 AS nvarchar(25)) AS Type_1
                 FROM   ProductionTest
            ) x
            pivot 
            (
                MAX(Type_1)
                for stepId in (' + @cols + ')
            ) p 
            UNION ALL
            SELECT ' + @colsAlias + ' from 
             (
                 select [StepID], CAST(ar1 AS nvarchar(25)) AS ar1
                 FROM   ProductionTest
            ) x
            pivot 
            (
                MAX(ar1)
                for stepId in (' + @cols + ')
            ) p 
            UNION ALL
            SELECT ' + @colsAlias + ' from 
             (
                 select [StepID], CAST(ar2 AS nvarchar(25)) AS ar2
                 FROM   ProductionTest
            ) x
            pivot 
            (
                MAX(ar2)
                for stepId in (' + @cols + ')
            ) p '

execute (@query)

查询仍然很复杂，但查询运行时将创建列。

这是一个带有演示的 SQL Fiddle

于 2012-06-19T19:46:12.450 回答
0

Pivot 不会旋转整个表格。我认为你需要类似的东西

SELECT [1]as Step1, [2] as Step2, [3]as Step3, [4]as Step4, [5]as Step5
FROM     ( SELECT [StepID], ShortDesc
           FROM   ProductionTest) p 
PIVOT (MAX(ShortDesc)
                     FOR StepID IN ([1], [2], [3], [4], [5])
       ) AS pvt

UNION ALL

SELECT [1]as Step1, [2] as Step2, [3]as Step3, [4]as Step4, [5]as Step5
FROM     ( SELECT [StepID], CAST(Type_1 AS nvarchar(25)) AS Type_1
           FROM   ProductionTest) p 
PIVOT (MAX(Type_1)
                     FOR StepID IN ([1], [2], [3], [4], [5])
       ) AS pvt

UNION ALL

SELECT [1]as Step1, [2] as Step2, [3]as Step3, [4]as Step4, [5]as Step5
FROM     ( SELECT [StepID], CAST(ar1 AS nvarchar(25)) AS ar1
           FROM   ProductionTest) p 
PIVOT (MAX(ar1)
                     FOR StepID IN ([1], [2], [3], [4], [5])
       ) AS pvt

UNION ALL

SELECT [1]as Step1, [2] as Step2, [3]as Step3, [4]as Step4, [5]as Step5
FROM     ( SELECT [StepID], CAST(ar2 AS nvarchar(25)) AS ar2
           FROM   ProductionTest) p 
PIVOT (MAX(ar2)
                     FOR StepID IN ([1], [2], [3], [4], [5])
       ) AS pvt
于 2010-09-10T17:15:57.490 回答