SQL多行变一列

CREATE TABLE DEPT

(DeptNo INT IDENTITY(1, 1)NOT NULL ,

 Country VARCHAR(50) ,

 Location VARCHAR(50) NULL

)

 

SET IDENTITY_INSERT DEPT ON

INSERT  DEPT( DeptNo, Country, Location )VALUES  ( 1, 'User1', 'A' )

INSERT  DEPT( DeptNo, Country, Location )VALUES  ( 2, 'User1', 'B' )

INSERT  DEPT( DeptNo, Country, Location )VALUES  ( 3, 'User2', 'C' )

INSERT  DEPT( DeptNo, Country, Location )VALUES  ( 4, 'User2', 'D' )

INSERT  DEPT( DeptNo, Country, Location )VALUES  ( 5, 'User2', 'E' )

INSERT  DEPT( DeptNo, Country, Location )VALUES  ( 6, 'User3', 'F' )

INSERT  DEPT( DeptNo, Country, Location )VALUES  ( 7, 'User3', 'G' )

INSERT  DEPT( DeptNo, Country, Location )VALUES  ( 8, 'User3', 'H' )

INSERT  DEPT( DeptNo, Country, Location )VALUES  ( 9, 'User3', 'I' )

SET IDENTITY_INSERT DEPT OFF

--按某一列出结果的

SELECT  B.Country ,LEFT(Location, LEN(Location) - 1) AS list

FROM    ( SELECT    Country ,

                            ( SELECT Location + ',' FROM DEPT WHERE Country = A.Country ORDER BY  DeptNo FOR XML PATH('')

                            ) AS Location

          FROM DEPT A GROUP BY  Country

        ) B