在 sql 中通过动态枢轴聚合多列

Question

我正在创建一个存储过程，允许用户通过提供 PersonID 数字作为参数从 2 table 中检索数据。我想过使用枢轴函数通过非聚合 [=36=] 在多个列上动态地枢转 Data table 并检索ONE 列中的数据在不同的 table 中。下面的 2 tables 只是示例数据，因为我有超过 100 列的数据 table，因此是动态部分。 2 table 没有共同的 ID 列，只有一个共同的 column_name。这是 2 tables：

映射Table:

CREATE table #table ( ID varchar(10) NOT NULL, Column_Name varchar (255) NOT NULL, Page_Num varchar(10) NOT NULL, Line_Num varchar(10) NOT NULL, Element_Num varchar(10) NOT NULL ) INSERT INTO #table (ID,Column_Name,Page_Num,Line_Num,Element_Num) VALUES ('1','Name', 'DT-01', '200','20') INSERT INTO #table (ID,Column_Name,Page_Num,Line_Num,Element_Num) VALUES ('2','SSN', 'DT-02', '220','10') INSERT INTO #table (ID,Column_Name,Page_Num,Line_Num,Element_Num) VALUES ('3','City', 'DT-03', '300','11') INSERT INTO #table (ID,Column_Name,Page_Num,Line_Num,Element_Num) VALUES ('4','StreetName', 'DT-04', '350','33') INSERT INTO #table (ID,Column_Name,Page_Num,Line_Num,Element_Num) VALUES ('5','Sex', 'DT-05', '310','51')

创建：

ID Column_Name Page_Num Line_Num Element_Num _________________________________________________________________ 1 Name DT-01 200 20 2 SSN DT-02 220 10 3 City DT-03 300 11 4 StreetName DT-04 350 33 5 Sex DT-05 310 51

数据table:

CREATE table #temp ( PersonID varchar (100) NOT NULL, Name varchar(100) NOT NULL, SSN varchar (255) NOT NULL, City varchar(100) NOT NULL, StreetName varchar(100) NOT NULL, Sex varchar(100) NOT NULL ) INSERT INTO #temp (PersonID,Name,SSN,City,StreetName,Sex) VALUES ('112','Joe','945890189', 'Lookesville', 'Broad st','Male') INSERT INTO #temp (PersonID,Name,SSN,City,StreetName,Sex) VALUES ('140','Santana','514819926', 'Falls Church', 'Gane Rd', 'Female') INSERT INTO #temp (PersonID,Name,SSN,City,StreetName,Sex) VALUES ('481','Wyatt','014523548','Gainesville', 'Westfield blvd', 'Male') INSERT INTO #temp (PersonID,Name,SSN,City,StreetName,Sex) VALUES ('724','Brittany','551489230','Aldi', 'Ostrich rd', 'Female') INSERT INTO #temp (PersonID,Name,SSN,City,StreetName,Sex) VALUES ('100','Giovanni','774451362','Paige', 'Company ln', 'Male')

创建：

PersonID Name SSN City StreetName Sex _______________________________________________________________________ 112 Joe 945890189 Lookesville Broad st Male 140 Santana 514819926 Falls Church Gane Rd Female 481 Wyatt 014523548 Gainesville Westfield rd Male 724 Brittany 551489230 Aldi Ostrich rd Female 100 Giovanni 774451362 Paige Company ln Male

最终结果应该是：示例：用户输入参数 PersonID = 140

Column_name Page_Num Line_Num Element_Num Data _____________________________________________________________________________ Name DT-01 200 20 Santana SSN DT-02 220 10 514819926 City DT-03 300 11 Falls Church StreetName DT-04 350 33 Gane Rd Sex DT-05 310 51 Female ... ... ... ... ...

等等..

Answer 1

以下将动态反透视数据行，然后对字段名称与 def 数据执行联接。

如果您想运行此查询不带过滤器，我建议将 A.PersonID 添加到顶部 SELECT 并删除 WHERE

我应该补充一点，UNPIVOT 会更高效，但使用这种方法，无需定义 and/or 重铸值。话虽如此，表现还是很可观的。

例子

Select D.*
      ,Data=C.Value
 From  #Temp A
 Cross Apply (Select XMLData = cast((Select A.* For XML Raw) as xml)) B
 Cross Apply (
                Select Item   = attr.value('local-name(.)','varchar(100)')
                      ,Value  = attr.value('.','varchar(max)') 
                 From  B.XMLData.nodes('/row') as X(r)
                 Cross Apply X.r.nodes('./@*') AS N(attr)
             ) C
 Join  #Table D on (C.Item=D.Column_Name)
 Where PersonID=140

Returns

如果它有助于可视化，则 CROSS APPLY C 生成以下内容：

EDIT - As a Stored Procedure

CREATE PROCEDURE [dbo].[YourProcedureName](@PersonID int) 

As

Begin
    Set NoCount On;

    Select D.*
          ,Data=C.Value
     From  YourPersonTableName A
     Cross Apply (Select XMLData = cast((Select A.* For XML Raw) as xml)) B
     Cross Apply (
                    Select Item   = attr.value('local-name(.)','varchar(100)')
                          ,Value  = attr.value('.','varchar(max)') 
                     From  B.XMLData.nodes('/row') as X(r)
                     Cross Apply X.r.nodes('./@*') AS N(attr)
                 ) C
     Join  YourObjectTableName D on (C.Item=D.Column_Name)
     Where PersonID=@PersonID

End

在 sql 中通过动态枢轴聚合多列

aggregate multiple columns over dynamic pivot in sql

tsql

pivot

dynamic