应用场景：将员工不同的职位合并到同一列

/*
应用场景：将员工不同的职位合并到同一列
*/
IF OBJECT_ID('A') IS NOT NULL
  DROP TABLE A
GO

CREATE TABLE A
(
NAME VARCHAR(20),
STATU VARCHAR(50)
)
GO

INSERT INTO A
SELECT '小张','普通员工'
UNION ALL
SELECT '小张','组长'
UNION ALL
SELECT '小二','经理'
UNION ALL
SELECT '小三','老板'
UNION ALL
SELECT '小三','员工'
GO

--方法一
SELECT DISTINCT NAME,STATUS=RIGHT(STATUS,LEN(STATUS)-1)
FROM
(
SELECT *,
STATUS=(SELECT ','+LTRIM(STATU) FROM A WHERE NAME=T.NAME FOR XML PATH(''))
FROM A T
) A
GO

--方法二
CREATE TABLE #A
(
ID INT IDENTITY(1,1),
NAME VARCHAR(20),
STATU1 VARCHAR(50),
STATU2 VARCHAR(50)
)
GO

INSERT INTO #A(NAME,STATU1,STATU2)
SELECT NAME,STATU1=STATU,STATU2=(SELECT STATU FROM A WHERE NAME=C.NAME AND STATU<>C.STATU)
FROM A C
GO

SELECT NAME,STATU1+CASE WHEN STATU2 IS NULL THEN '' ELSE ','+STATU2 END
FROM #A C
WHERE NOT EXISTS(SELECT * FROM #A WHERE ID<C.ID AND NAME=C.NAME AND STATU1=C.STATU2 AND STATU2=C.STATU1)
GO