sql - 如何使用 SQL 实现以下结果集

Question

EID PID     Metric  Limit1  Limit2  Limit3
1    8       20       <      210    <
1    8       22       >       89    >=

我有以下要求

来源

要转变为

EID PID     20-Limit1    20-Limit2 20-Limit3  22-Limit1  22-Limit2   22-Limit3
1    8        <             210     <          >          89           >=

你能帮忙吗？

Answer 1

请尝试使用此代码

      Create table #TempTable (EID INT,PID INT,Col1 VARCHAR(100),Col2 VARCHAR(100))

      ;WITH TestingCTE AS(
            Select EID,PID,
            Cast(Metric as varchar(50))+'-'+ColumnName AS Col1,
            Columnvalue AS Col2,
            Cast(Metric as varchar(50)) +'-'+ ColumnName1 AS Col3,
            Columnvalue1 AS col4,
            Cast(Metric as varchar(50)) +'-'+ ColumnName2 AS col5,
            Columnvalue2  AS col6
            from 
                 (
           select EID,PID,Metric,Limit1,Limit2,Limit3 from Testing
                 ) src
           unpivot
                (
                Columnvalue for ColumnName in (Limit1)
                ) un
           unpivot
                (
               Columnvalue1 for ColumnName1 in (Limit2)
               ) un
          unpivot
              (
              Columnvalue2 for ColumnName2 in (Limit3)
              ) un  
           )
        INsert into #TempTable (EID,PID,Col1,Col2)
        Select EID,PID,Col1,Col2 from TestingCTE
        UNION ALL
        Select EID,PID,Col3,Cast(Col4 as Varchar(100)) from TestingCTE
        UNION ALL
        Select EID,PID,Col5,Col6 from TestingCTE

        Declare @var NVARCHAR(MAX)
        Declare @query NVARCHAR(MAX)
        Select @var= Stuff((SELECT ', ' + QUOTENAME(col1) from #TempTable       
                For XML PATH ('')),1,1,'')

        SET @query='Select * from (Select * from #TempTable) a
        PIVOT(MAX(col2) for col1 IN('+@var+'))Pivoted'

        EXEC sp_executesql @query

        Drop table #TempTable