复制代码 代码如下:

--创建 test 表 ，插入数据

CREATE TABLE test(code varchar(50), [values] varchar(10),[count] int)

INSERT test SELECT '001', 'aa',1

UNION ALL SELECT '001', 'bb',2

UNION ALL SELECT '002', 'aaa',4

UNION ALL SELECT '002', 'bbb',5

UNION ALL SELECT '002', 'ccc',3;

--方法一

--将多行合并成一行，并做分组统计

SELECT code,

[values] =

stuff(b.[values].value('/R[1]', 'nvarchar(max)'),

,

,

''),[count]

FROM (SELECT code,sum([count]) as [count]

FROM test

GROUP BY code) a

CROSS apply (

SELECT [values] =(

SELECT N',' + [values] FROM test

WHERE code = a.code

FOR XML PATH(''), ROOT('R'), TYPE

)

) b;

--方法二

---SQL2005中的新解法 使用XML

SELECT code, data=STUFF((SELECT ','+[values] FROM test t WHERE code=t1.code FOR XML PATH('')), 1, 1, ''),sum([count]) as [count]

FROM test t1

GROUP BY code

--查询结果

--001 aa,bb 3

--002 aaa,bbb,ccc 12

drop table test