SQL 数据透视表中的重复列

Question

我有一组原始数据存储在数据库中，如下所示：

ReportDate  Server  AvgAvail    outageID
6/4/2015    CPU1    0.9797  11111111
6/4/2015    CPU2    0.9999  NULL
6/4/2015    CPU3    0.9999  NULL
6/4/2015    CPU4    0.9999  NULL
6/5/2015    CPU1    0.9999  NULL
6/5/2015    CPU2    0.9999  NULL
6/5/2015    CPU3    0.9887  22222222
6/5/2015    CPU4    0.9999  NULL
6/6/2015    CPU1    0.9999  NULL
6/6/2015    CPU2    0.9999  NULL
6/6/2015    CPU3    0.9999  NULL
6/6/2015    CPU4    0.9999  NULL
6/6/2015    CPU5    0.9999  NULL

我目前使用 TSQL 和动态 SQL 来生成 table，因为可以通过日期选择器选择报告日期。我想让输出如下所示：

Server  OutageID    6/4/2015    OutageID    6/5/2015    OutageID    6/6/2015
CPU1    11111111    0.9797      NULL        0.9999      NULL        0.9999
CPU2    NULL        0.9999      22222222    0.9887      NULL        0.9999
CPU3    NULL        0.9999      NULL        0.9999      NULL        0.9999
CPU4    NULL        0.9999      NULL        0.9999      NULL        0.9999
CPU5    NULL        NULL        NULL        NULL        NULL        0.9999

这是我现在的 SQL:

DECLARE @cols NVARCHAR(2000) 
DECLARE @cols2 NVARCHAR(2000) 
DECLARE @query NVARCHAR(4000) 

SELECT @cols = Coalesce( @Cols+',['+ ReportDate +']','['+ ReportDate+']'), 
@cols2 = Coalesce( @Cols2+',[outageID],['+ ReportDate +']','[outageID],['+ ReportDate+']') 
FROM AVTABLE WHERE ReportDate > getdate() - 22 GROUP BY ReportDate ORDER BY ReportDate 

SET @query = 'SELECT Server,'+@cols2+' FROM AVTABLE AS SRC PIVOT (Min(AvgAvail) FOR ReportDate in ('+@cols+')) AS PVT' 

EXEC(@query)

问题是 Pivot 正在复制带有中断号的行。关于如何解决它的任何想法？ TIA

Answer 1

此查询将为您提供您want.does未使用数据透视语法的结果。

DECLARE @cols NVARCHAR(2000) =''
DECLARE @cols2 NVARCHAR(2000)=''
DECLARE @query NVARCHAR(4000)='' 

SELECT @cols = @cols + ',[OutageID] =  MAX(CASE  WHEN ReportDate = '''+CAST(ReportDate as varchar)+''' THEN   OutageID  END)'
                     + ',['+CAST(ReportDate as varchar)+'] = MAX(CASE  WHEN ReportDate ='''+CAST(ReportDate as varchar)+''' THEN   avgavail  END)'
FROM AVTABLE  GROUP BY ReportDate ORDER BY ReportDate 

SET @query = 'SELECT [server] ' +@cols+ ' FROM AVTABLE GROUP BY [server] '

EXECUTE  (@query)

SQLFiddle for Query

SQL 数据透视表中的重复列

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