Question

我有一组存储在数据库中的原始数据，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生成表格，因为可以通过日期选择器选择报告日期。我想让输出看起来如下：

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

这是我当前的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码的行。有关如何解决它的任何想法？ TIA

Answer 1

此查询将为您提供所需的结果。不使用数据透视语法。

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

TSQL Pivot中的重复列

1 个答案: