Question

在SQL服务器中，我有一个名为Table Employee的表。在Employee talbe中有一个列字段名称依赖于表名。在此表中，Employee依赖于其他人。 Dependvalue值重复多次Times Dpendent Column。

Employee Name                         DependName  
Kelly, Sean                           Elieen Kelly 
Kelly, Sean                           Sienna Kelly 
Kelly, Sean                           Elieen Kelly 
Kelly, Sean                           Sienna Kelly
Kelly, Sean                           Kevin  Kelly
Kelly, Sean                           Mark  Kelly 
Neuenschwander                        Spide kelly 
Neuenschwander                        sumiln Kelly

在此表中，员工姓名重复多次，并且Dependent Employee也会重复多次。我有大文件。我不知道有多少dpendname是SQL文件。它采取Long Sql文件。所以我希望Table像这样.spilit on on Employee name

 Employee Name        DependName1  DependName2    DependName3  DependName4
 Elieen Kelly         Elieen Kelly  Sienna Kelly  Kevin Kelly Mark Kelly 
Neuenschwander        Spide kelly   sumiln Kelly

更新：

  Employee Name        DependName1  DependName2    DependName3  DependName4
    Kelly, Sean       Elien Kelly   SieeaKelly    SieeaKelly    SieeaKelly

我的表就像。在这个SQL大文件中，一些员工可能会有更多的DependName。如何spilit表喜欢。如何在DependName上创建Basesd列？提前谢谢

Answer 1

一个简单的条件聚合与Row_Number（）（或Dense_Rank（）一起消除重复）可以解决这个问题如果你不需要动态

Declare @YourTable table (EmployeeName varchar(50), DependName  varchar(50))
Insert Into @YourTable values
('Kelly, Sean'   ,'Elieen Kelly'), 
('Kelly, Sean'   ,'Sienna Kelly'), 
('Kelly, Sean'   ,'Elieen Kelly'), 
('Kelly, Sean'   ,'Sienna Kelly'),
('Kelly, Sean'   ,'Kevin  Kelly'),
('Kelly, Sean'   ,'Mark  Kelly'), 
('Neuenschwander','Spide kelly'), 
('Neuenschwander','sumiln Kelly') 


Select EmployeeName
      ,DependName1  = max(case when RN=1 then DependName else '' end)
      ,DependName2  = max(case when RN=2 then DependName else '' end)
      ,DependName3  = max(case when RN=3 then DependName else '' end)
      ,DependName4  = max(case when RN=4 then DependName else '' end)
 From  (
            Select *,RN=Dense_Rank() over (Partition By EmployeeName Order by DependName)
             From  @YourTable
       ) A
 Group By EmployeeName

返回

EmployeeName    DependName1     DependName2     DependName3   DependName4
Kelly, Sean     Elieen Kelly    Kevin  Kelly    Mark  Kelly   Sienna Kelly
Neuenschwander  Spide kelly     sumiln Kelly

如何创建自动增量列基于值

1 个答案: