需要协助PIVOT表

Question

我有一个SQL查询，我需要转换成PIVOT表。眼下数据显示为这样...

但我真的希望它出现与ProcessDesc作为列标题和“交叉点”是DateCompleted，如....

我该怎么做到这一点？创建原来的查询是如下查询...

SELECT DISTINCT E.DisplayName, EPM.DateCompleted, PS.SortNumber, PS.ProcessDesc 
FROM dbo.EPM 
    INNER JOIN dbo.PS 
    ON EPM.EPS = PS.ID 
    INNER JOIN dbo.E 
    ON EPM.ID = E.ID 
WHERE DisplayName IS NOT NULL 
ORDER BY E.DisplayName, PS.SortNumber 

Answer 1

SELECT E.DisplayName, 
MAX(CASE WHEN PS.ProcessDesc='Set-Up Form 1' THEN EPM.DateCompleted END) as [Set-Up Form 1], 
MAX(CASE WHEN PS.ProcessDesc='Set-Up Form 2' THEN EPM.DateCompleted END) as [Set-Up Form 2], 
MAX(CASE WHEN PS.ProcessDesc='Set-Up Form 3' THEN EPM.DateCompleted END) as [Set-Up Form 3] 
FROM dbo.EPM 
    INNER JOIN dbo.PS 
    ON EPM.EPS = PS.ID 
    INNER JOIN dbo.E 
    ON EPM.ID = E.ID 
WHERE DisplayName IS NOT NULL 
GROUP BY E.DisplayName 
ORDER BY E.DisplayName, PS.SortNumber 

Answer 2

试试这个：

SELECT DISTINCT E.DisplayName, EPM.DateCompleted, PS.SortNumber, PS.ProcessDesc 
FROM dbo.EPM 
    INNER JOIN dbo.PS 
    ON EPM.EPS = PS.ID 
    INNER JOIN dbo.E 
    ON EPM.ID = E.ID 
WHERE DisplayName IS NOT NULL 
ORDER BY E.DisplayName, PS.SortNumber 

SOLUTION：

#TEMP这里将您的查询生成一个使用动态SQL

declare @sql1 as varchar(4000) = '' 
declare @sql2 as varchar(4000) = '' 
declare @sql3 as varchar(4000) = '' 

set @sql1 = 
'select 
    DisplayName 
' 

select @sql2 = @sql2 + 
' ,max(case when ProcessDesc = ''' + ProcessDesc + ''' then DateCompleted end) as [' + ProcessDesc +'] 
' 
from #TEMP 
order by ProcessDesc, ProcessSort 

set @sql3 = 
' 
from #TEMP 
group by DisplayName 
ORDER BY DisplayName 
' 
print @sql1 + @sql2 +@sql3 
exec(@sql1 + @sql2 +@sql3)