0

我有一个包含许多列的 SQL 表，特别是一组包含代码的列。对于每个代码列，还存在与每个代码列相关的相应信息列。我需要能够将一条记录变成多条返回记录（即每个代码一条记录）。这是一个带有遗留数据和软件代码的旧表，并且很难对表进行规范化（即使它确实需要）。

这是表格：

CO_ComapnyInformation
                (
                 ProjectID
                ,SubContractor_OrgID
                ,BudGet
                ,ContractDays
                ,ContractCode
                ,ContractCode1
                ,ContractCode2
                ,ContractCode3
                ,ContractCode4
                ,ContractCode5
                ,ContractCodeAmt
                ,ContractCode1Amt
                ,ContractCode2Amt
                ,ContractCode3Amt
                ,ContractCode4Amt
                ,ContractCode5Amt
                ,ContractStartDate
                ,ContractCodeBudget
                ,ContractCodeBudget1
                ,ContractCodeBudget2
                ,ContractCodeBudget3
                ,ContractCodeBudget4
                ,ContractCodeBudget5
                ,ContractCodeAdjust
                ,ContractCodeAdjust1
                ,ContractCodeAdjust2
                ,ContractCodeAdjust3
                ,ContractCodeAdjust4
                ,ContractCodeAdjust5
                ,ContractCodeUncommit
                ,ContractCodeUncommit1
                ,ContractCodeUncommit2
                ,ContractCodeUncommit3
                ,ContractCodeUncommit4
                ,ContractCodeUncommit5
                ,ContractCodeSaveOR
                ,ContractCodeSaveOR1
                ,ContractCodeSaveOR2
                ,ContractCodeSaveOR3
                ,ContractCodeSaveOR4
                ,ContractCodeSaveOR5
                )

基本上我需要返回的记录集看起来像这样：

Contract Code | Contract Budget | Contract Adjust | Contract Uncommit | Contract SaveOR | Pro_ID | ...
ContractCode    10.00             xxxx
ContractCode1
ContractCode2

ETC...

仅当 COntractCode 列中包含数据时。

我该怎么做呢？

4

2 回答 2

3

你可以用union all它来做。

select 'ContractCode' as ContractCodeType, ContractCode, ContractCodeBudget, ...
from CO_ComapnyInformation

union all

select 'ContractCode1' as ContractCodeType, ContractCode1, ContractCodeBudget1, ...
from CO_ComapnyInformation

...

也许您不需要第一列 ( ContractCodeType)，它只是为了让您知道该行来自哪一组值。

但理想情况下，如果这些字段存储相同类型的信息，最好有一个仅包含一组字段的更简单的表。您可以从其顶部的视图开始（基本上就是union上面的代码），然后以小步骤重构您的应用程序。

于 2012-10-24T16:21:30.910 回答
1

您应该能够通过使用 SQLServer 的数据透视/取消数据透视功能从基表中进行一次选择来执行此操作 - 例如：

select ProjectID, 
       Contract_Code, 
       max(Budget) Budget, 
       max(Adjust) Adjust, 
       max(Uncommit) Uncommit, 
       max(SaveOR) SaveOR
from
(select ProjectID, vals, left(cols,1,13) Contract_Code, right(cols,len(cols)-13) col_head from
 (select ProjectID,
         ContractCodeBudget  ContractCode_Budget,
         ContractCodeBudget1 ContractCode1Budget,
         ContractCodeBudget2 ContractCode2Budget,
         ContractCodeBudget3 ContractCode3Budget,
         ContractCodeBudget4 ContractCode4Budget,
         ContractCodeBudget5 ContractCode5Budget,
         ContractCodeAdjust  ContractCode_Adjust,
         ContractCodeAdjust1 ContractCode1Adjust,
         ContractCodeAdjust2 ContractCode2Adjust,
         ContractCodeAdjust3 ContractCode3Adjust,
         ContractCodeAdjust4 ContractCode4Adjust,
         ContractCodeAdjust5 ContractCode5Adjust,
         ContractCodeUncommit  ContractCode_Uncommit,
         ContractCodeUncommit1 ContractCode1Uncommit,
         ContractCodeUncommit2 ContractCode2Uncommit,
         ContractCodeUncommit3 ContractCode3Uncommit,
         ContractCodeUncommit4 ContractCode4Uncommit,
         ContractCodeUncommit5 ContractCode5Uncommit,
         ContractCodeSaveOR  ContractCode_SaveOR,
         ContractCodeSaveOR1 ContractCode1SaveOR,
         ContractCodeSaveOR2 ContractCode2SaveOR,
         ContractCodeSaveOR3 ContractCode3SaveOR,
         ContractCodeSaveOR4 ContractCode4SaveOR,
         ContractCodeSaveOR5 ContractCode5SaveOR
  from CO_ComapnyInformation) t
 unpivot (vals for cols in (ContractCode_Budget,ContractCode1Budget,ContractCode2Budget,ContractCode3Budget,ContractCode4Budget,ContractCode5Budget,
                            ContractCode_Adjust,ContractCode1Adjust,ContractCode2Adjust,ContractCode3Adjust,ContractCode4Adjust,ContractCode5Adjust,
                            ContractCode_Uncommit,ContractCode1Uncommit,ContractCode2Uncommit,ContractCode3Uncommit,ContractCode4Uncommit,ContractCode5Uncommit,
                            ContractCode_SaveOR,ContractCode1SaveOR,ContractCode2SaveOR,ContractCode3SaveOR,ContractCode4SaveOR,ContractCode5SaveOR
                            )
          ) as t1
) as t2
pivot (max(vals) for col_head in ([Budget],[Adjust],[Uncommit],[SaveOR])) as t3
group by ProjectID, Contract_Code
于 2012-10-24T17:37:17.903 回答