在動態數據透視表中使用臨時表

Question

我想在動態數據透視查詢中使用臨時表。我讀過該過程不起作用，因爲即使它是一個全局表，臨時表也不在該範圍之內。這對我來說很奇怪，因爲它在sql小提琴中有效，但在SQL Server 2012中不起作用。我如何編輯我的查詢以使它給出輸出，而不是（受xxx行影響）？

這裏是我的查詢：

SELECT   cc.CaseCaseId AS CaseId, cc.Label AS CaseName, rce.EcoDate, cc.OperatorName, cc.State, cc.County, ei.IROR, rce.NDCash 
into ##Temp2 
FROM   PhdRpt.ReportCaseList_542 AS rcl INNER JOIN 
         CaseCases AS cc ON rcl.CaseCaseId = cc.CaseCaseId INNER JOIN 
         PhdRpt.RptCaseEco_542 AS rce ON rcl.ReportRunCaseId = rce.ReportRunCaseId INNER JOIN 
         PhdRpt.EcoIndicators_542 AS ei ON rcl.ReportRunCaseId = ei.ReportRunCaseId 


DECLARE @colsPivot AS NVARCHAR(MAX), 
@colsUnpivot as NVARCHAR(MAX), 
@query AS NVARCHAR(MAX) 

select @colsPivot = STUFF((SELECT distinct ',' + QUOTENAME(EcoDate) 
from ##Temp2 
FOR XML PATH(''), TYPE 
).value('.', 'NVARCHAR(MAX)') 
,1,1,'') 

select @colsUnpivot = stuff((select ','+quotename(C.name) 
from sys.columns as C 
where C.object_id = object_id('##Temp2') and 
C.name LIKE 'NDCash%' 
for xml path('')), 1, 1, '') 


set @query 
= 'select * 
from 
(
select cc.CaseCaseId AS CaseId, cc.Label AS CaseName, rce.EcoDate, cc.OperatorName, cc.State, cc.County, ei.IROR, val, col 
FROM   ##Temp2 
unpivot 
(
val 
for col in ('+ @colsunpivot +') 
) u 
) x1 
pivot 
(
max(val) 
for EcoDate in ('+ @colspivot +') 
) p' 

exec(@query) 


Drop table ##Temp2 

這裏是表結構：

CaseId  EcoDate   NDCash 
2   2003-01-01 26.6384943638238 
2   2004-01-01 23.9534867373416 
2   2005-01-01 25.9197356158675 
2   2006-01-01 25.3280437702064 
2   2007-01-01 24.9828609298022 
2   2008-01-01 26.4019321789285 
2   2009-01-01 26.6384943638238 
2   2010-01-01 24.0660715481002 
2   2011-01-01 26.6384943638238 
2   2012-01-01 22.5718444448345 
2   2013-01-01 26.6384943638238 

Answer 1

除非我遺漏了一些東西，否則不需要使用UNPIVOT來實現這一點，而且您不需要使用臨時表，只需直接查詢數據即可。它看起來像你當前的查詢只是unpivoting一個不需要的列。您使用unpivot將多個列轉換爲多個行。

您應該能夠使用：

DECLARE @colsPivot AS NVARCHAR(MAX), 
@query AS NVARCHAR(MAX) 

select @colsPivot = STUFF((SELECT ',' + QUOTENAME(rce.EcoDate) 
          from PhdRpt.RptCaseEco_542 AS rce 
          group by rce.EcoDate 
          order by rce.EcoDate 
        FOR XML PATH(''), TYPE 
        ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'') 

set @query 
= 'select * 
from 
(
    SELECT cc.CaseCaseId AS CaseId, 
     cc.Label AS CaseName, 
     rce.EcoDate, 
     cc.OperatorName, 
     cc.State, 
     cc.County, 
     ei.IROR, 
     rce.NDCash 
    FROM PhdRpt.ReportCaseList_542 AS rcl 
    INNER JOIN CaseCases AS cc 
     ON rcl.CaseCaseId = cc.CaseCaseId 
    INNER JOIN PhdRpt.RptCaseEco_542 AS rce 
     ON rcl.ReportRunCaseId = rce.ReportRunCaseId 
    INNER JOIN PhdRpt.EcoIndicators_542 AS ei 
     ON rcl.ReportRunCaseId = ei.ReportRunCaseId 
) x1 
pivot 
(
    max(NDCash) 
    for EcoDate in ('+ @colspivot +') 
) p' 

exec(@query) 

Answer 2

更改Exec（@query）到sp_executesql的@query。

exec（@query）將不會在當前上下文中執行，但是sp_executeSQL將以包含臨時表的當前上下文執行。