将列数据转换为行数据

Question

Column_A        Column_B
Akash.Bansal    Deactivate_User
Akash.Bansal    Deactivate_Int_User

我希望输出为：

Akash.Bansal | Deactivate_User |Deactivate_Int_User |Delete_User |Delete_Inter_User|

我可以将一列作为行。任何人都可以帮助实现上述目标

Answer 1

您可以使用STUFF()功能执行此操作。试试这样的事情，

CREATE TABLE TestUsr(Column_A VARCHAR(50), Column_B VARCHAR(50))

INSERT INTO TestUsr(Column_A, Column_B) VALUES

('Akash.Bansal', 'Deactivate_User'),
('Akash.Bansal', 'Deactivate_Int_User')

SELECT Column_B FROM
(
   SELECT ROW_NUMBER() OVER(PARTITION BY Column_A ORDER BY Column_A) RN, 
   Column_B = Column_A + ' | ' +
   STUFF((SELECT ' | ' + Column_B
   FROM TestUsr b FOR XML PATH('')), 1, 2, '') + ' | '
   FROM TestUsr  a
 ) AS E WHERE RN = 1

Sql Fiddle Demo

Answer 2

试试这个

WITH    cte
          AS ( SELECT   Column_A ,
                        Column_B
               FROM     ( VALUES ( 'Akash.Bansal', 'Deactivate_User'),
                        ( 'Akash.Bansal', 'Deactivate_Int_User'),
                        ( 'Akash.Bansal', 'Delete_User'),
                        ( 'Akash.Bansal', 'Delete_Inter_User'),
                        ( 'John.Dohn', 'Create'),
                        ( 'John.Dohn', 'Update')

                         ) AS T ( Column_A, Column_B )
             )
    SELECT  A.Column_A ,
            SUBSTRING(( SELECT  ' ' + B.Column_B + ' |'
                        FROM    cte AS B
                        WHERE   A.Column_A = B.Column_A
                      FOR
                        XML PATH('')
                      ), 2, 1000) AS String, 
                      COUNT(*) Cnt
    FROM    cte AS A     
    GROUP BY A.Column_A

结果

Answer 3

我不确定您要对此数据做什么。您是在寻找单个字符串，还是在寻找Column_B中的数据以放入每个名称的列（Column_A）？

如果是这样，你可以使用PIVOT语句（如果Column_B选项是有限的）

declare @Example table (
    Column_A nvarchar(20),
    Column_B nvarchar(20)
)

insert into @Example values ('Akash.Bansal','Deactivate_User')
insert into @Example values ('Akash.Bansal','Deactivate_Int_User')
insert into @Example values ('Akash.Bansal','Delete_User ')
insert into @Example values ('Akash.Bansal','Delete_Inter_User')
insert into @Example values ('John.Doe','Deactivate_User')
insert into @Example values ('Jane.Doe','Deactivate_Int_User')
insert into @Example values ('Jane.Doe','Delete_User ')
insert into @Example values ('Jane.Doe','Delete_Inter_User')

select
    *
from
    @Example
PIVOT
(
    MIN(Column_B)
    FOR Column_B IN (Deactivate_User,Deactivate_Int_User,Delete_User,Delete_Inter_User)
) pivotTable

这将给出以下结果集：

如果您愿意，甚至可以根据需要制作一个大字符串：

select
    pivotTable.Column_A,
   STUFF(
       COALESCE(' | ' + NULLIF(Deactivate_User, ''), '')  + 
       COALESCE(' | ' + NULLIF(Deactivate_Int_User, ''), '') +
       COALESCE(' | ' + NULLIF(Delete_User, ''), '') +
       COALESCE(' | ' + NULLIF(Delete_Inter_User , ''), ''),
       1, 3, '') AS String
from
    @Example
PIVOT
(
    MIN(Column_B)
    FOR Column_B IN (Deactivate_User,Deactivate_Int_User,Delete_User,Delete_Inter_User)
) pivotTable

这会得到以下结果：