--------------------第一步:新建表:Test----------------------------
CREATE TABLE test(id varchar(50),[values] varchar(10))
INSERT test SELECT '001','aa'
UNION ALL SELECT '001','bb'
UNION ALL SELECT '002','aaa'
ottom:0.5em; font-family:Arial,'bbb'
ottom:0.5em; font-family:Arial,'ccc';
具体实现的方法:
方法①
SELECT id,
[values] =
stuff(b.[values].value('/R[1]','nvarchar(max)'),宋体; font-size:14px; line-height:25px"> 1,宋体; font-size:14px; line-height:25px"> '')
FROM (SELECT id
FROM test
GROUP BY id) a
CROSS apply (
SELECT [values] =(
SELECT N',' + [values] FROM test
WHERE id = a.id
FOR XML PATH(''),ROOT('R'),TYPE
)
) b;
方法②:
ottom:0.5em; font-family:Arial,data=STUFF((SELECT ','+[values] FROM test t WHERE id=t1.id FOR XML PATH('')),1,'')
FROM test t1
GROUP BY id
最后结果:
id data
------------- ----------------------
001 aa,bb
002 aaa,bbb,ccc
(2 行受影响)
不想要test的时候:drop table test