连接两列并按ID连接

Question

并预先感谢！ 我正在寻找最有效的方法来连接每个“秘书”，其中JobTitle =“ Assistant”，然后通过“ Empl_code”加入另一个表。 这将在视图中完成。

declare @Atty_Sec table
(    Empl_Code int,
    Attorney varchar(20),
    Secretary varchar(50),
    SecJobTitle varchar(50)
)
insert into @Atty_Sec
select 1,'John Smith','Mary Anne', 'Assistant' union all
select 1,'John Smith', 'Joanne Rockit','Office Manager'union all
select 1,'John Smith', 'Sharon Osbourne','Assistant'union all
select 2,'Steve Jobs', 'Katherine Kay','Assistant' union all
select 2,'Steve Jobs','Rylee Robot','Office Manager' union all
select 3,'Mike Michaels','Joe Joseph','Assistant' union all
select 3,'Mike Michaels','Ronald McDonald','Office Manager'

Select * from @Atty_Sec

加入该表：

declare @UserTable table
(
    Empl_Code int,
    Attorney varchar(20)

)
insert into @UserTable
select 1,'John Smith' union all
select 2,'Steve Jobs'union all
select 3,'Mike Michaels'

Select * from @UserTable 

视图的输出应看起来像这样，其中有两列“ Empl_Code”，其中一列称为[Assistants]：

• 1玛丽·安妮； 莎朗·奥斯本
• 2凯瑟琳·凯
• 3乔·约瑟夫

Answer 1

Select A.Empl_Code
      ,Assistants = B.Value
 From (Select Distinct Empl_Code From @Atty_Sec) A
 Cross Apply (Select Value=Stuff((Select Distinct ',' + Secretary 
                      From  @Atty_Sec 
                      Where Empl_Code=A.Empl_Code 
                        and SecJobTitle ='Assistant'
                      For XML Path ('')),1,1,'') 

             ) B

返回

Empl_Code   Assistants 
1           Mary Anne,Sharon Osbourne
2           Katherine Kay
3           Joe Joseph

Answer 2

您可以按以下方式使用分组依据和内容：

select a.empl_code, stuff((select ','+ secretary from @atty_Sec where empl_Code = a.empl_Code and SecJobTitle = 'Assistant' for xml path('')),1,1,'')
  from @Atty_Sec a
group by a.Empl_Code