实施枢轴查询

Question

我如何旋转以下选择语句：

         SELECT sc.CID,
                sc.CodeName     as OverviewText,
                scRAG.CodeName  as RAGStatusText 
           FROM StatusCode      sc
LEFT OUTER JOIN ProjectOverview po 
             ON sc.CID          = po.ProjectOverviewCID 
            AND po.ProjectId    = 180
LEFT OUTER JOIN StatusCode      scRAG 
             ON po.RAGStatusCID = scRAG.CID
          WHERE sc.SCID         = 18

这样的语句得出以下结果集：

CID OverviewText    RAGStatusText
--- ------------    -------------
153 Cost            Green
154 Requirements    Yellow
155 Schedule        NULL
156 Technical       NULL
157 Testing         NULL

但是，我希望它能返回一个带有10个值的单行，如图所示：Bellow：

 ----------------------------------------------------------------------------------------------
 | Cost | Green | Requirements | Yellow | Schedule | NULL | Technical | NULL | Testing | NULL |
 ----------------------------------------------------------------------------------------------

我可以旋转吗 CID?

Answer 1

我不确定这是否正是您想要的。但这给出了您的预期结果。请注意，您可以根据需要重命名列。

SET NOCOUNT ON

declare @t table(
    cid int,
    OverviewText varchar(15),
    RAGStatusText varchar(15)
 )

insert into @t values (153, 'Cost',           'Green');
insert into @t values (154, 'Requirements',   'Yellow');
insert into @t values (155, 'Schedule',       'NULL');
insert into @t values (156, 'Technical',      'NULL');
insert into @t values (157, 'Testing',        'NULL');


Select 
    [153|1] as [xyz],
    [153|2],
    [154|1],
    [154|2],
    [155|1],
    [155|2],
    [156|1],
    [156|2],
    [157|1],
    [157|2]

FROM (
select CAST(cid as varchar) + '|1' type, OverviewText  text from @t
Union
select CAST(cid as varchar) + '|2' type, RAGStatusText text from @t
) as SourceTable
Pivot(
    min(text)
    for type in ([153|1],[153|2], [154|1],[154|2], [155|1],[155|2], [156|1],[156|2], [157|1],[157|2])
) as PivotTable;