当标记允许为1时，如何构建选择查询将温度值拆分为两列，每列第一列，另一列为文本列？ [英] How to Build select Query split Temp Value to two column one Per Number And Another to Text when Flag Allow 1?

问题描述

我正在处理SQL Server 2012的查询。我有一个问题：我无法建立选择

I work on a query for SQL Server 2012. I have an issue: I can't build select

查询将列临时值拆分为两列临时表#nonparametric具有标志Allow = 1

Query split Column Temp value to two Column When row in the temp table #nonparametric has the flag Allow = 1,

当标志Allow = 1时，它必须将列Temp值从#nonparametric拆分为两列。

it must split column Temp value from #nonparametric to two column when the flag Allow = 1 .

假定列Temp值的值为50.40 kg，必须将其拆分为两列

suppose column Temp value has value 50.40 kg it must split to two column

第一列的编号为50.40，并且

First column with number so it will have 50.40 and it will be same Name as Parametric .

带有文本的第二列，因此它将具有kg，并且将与Parametric +'Units'相同。

Second column with Text so it will have kg and it will be same Name as Parametric + 'Units'.

表示名称将为ParametricUnit。

meaning Name will be ParametricUnit .

我需要构建将Flag Allow = 1时将其分为两列的查询。

I need to build query that split this on two column when Flag Allow =1 .

create table #nonparametricdata
(
PART_ID nvarchar(50) ,
CompanyName  nvarchar(50),
PartNumber nvarchar(50),
DKFeatureName nvarchar(100),
Tempvalue nvarchar(50),
FlagAllow bit
)

insert into #nonparametricdata
values
('1222','Honda','silicon','package','15.50Am',0),
('1900','MERCEIS','GLASS','family','90.00Am',1),--Build select query split data because FlagAllow=1
('5000','TOYOTA','alominia','source','70.20kg',0),
('8000','MACDA','motor','parametric','50.40kg',1),----Build select query split data because FlagAllow=1
('8900','JEB','mirror','noparametric','75.35kg',0)

create table #FinalTable
(
DKFeatureName  nvarchar(50),
DisplayOrder  int
)

insert into #FinalTable (DKFeatureName,DisplayOrder) 
values 
('package',3),
('family',4),
('source',5),
('parametric',2),
('noparametric',1)

我在下面尝试什么：

   DECLARE @SelectqueryData NVARCHAR(MAX)
   SELECT
   @SelectqueryData = STUFF(
    (
        SELECT ', ' +  case when B.FlagAllow = 1 then '['+A.DKFeatureName+'],['+A.DKFeatureName+'Unit]' else quotename(A.DKFeatureName) end
        FROM #FinalTable A
        join  (Select distinct DKFeatureName,FlagAllow 
   From #nonparametricdata 
 ) B on A.DKFeatureName=B.DKFeatureName

        ORDER BY DisplayOrder
        FOR XML PATH ('')
    ),1,2,''
)
select @SelectqueryData
--select @SelectqueryData from table

预期结果为：

[noparametric], [parametric]--QueryGetNumber,[parametricUnit]--QueryGetUnitOfMeasure
, [package], [family]--QueryGetNumber,[familyUnit]--QueryGetUnitOfMeasure, [source]

在上面进行查询时，它必须给我结果为图像（仅用于解释）：

when make query above it must give me result as image(for Explain Only) :

推荐答案

您正在寻找动态的PIVOT

You're looking for a DYNAMIC PIVOT

示例

DECLARE @SelectqueryData NVARCHAR(MAX)
SELECT  @SelectqueryData = STUFF( (
           SELECT ', ' +  case when B.FlagAllow = 1 then '['+A.DKFeatureName+'],['+A.DKFeatureName+'Unit]' else quotename(A.DKFeatureName) end
           FROM #FinalTable A
           join  (Select distinct DKFeatureName,FlagAllow 
                   From #nonparametricdata 
                  ) B on A.DKFeatureName=B.DKFeatureName
           ORDER BY DisplayOrder
           FOR XML PATH ('')
         ),1,2,''
)

Declare @SQL varchar(max) = '
Select *
 From  (
        Select A.Part_ID 
              ,A.PartNumber
              ,A.CompanyName
              ,B.*
         From  #nonparametricdata A
         Cross Apply ( values ( DKFeatureName         ,case when FlagAllow=1 then left(TempValue,patindex(''%[A-Z]%'',TempValue+''A'')-1) else TempValue end ) 
                             ,( DKFeatureName+''Unit'',case when FlagAllow=1 then substring(TempValue,patindex(''%[A-Z]%'',TempValue+''A''),10) else null end ) 
                     ) B(Item,Value)
       ) src
 Pivot (max(value) for Item in ('+@SelectqueryData+') ) pvt
'
--Print @SQL
Exec(@SQL)            

返回

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