场景一   某表中   id，name，sex    根绝 id  分组  将一组的name 相加用逗号隔开   将sex 相加用逗号隔开

用到的sql  函数  for xml  和 STUFF  

SELECT
id,
[name] = stuff(
(
SELECT
‘,‘ + [name]
FROM
tabla AS a
WHERE
a.name = b.namefor xml path (‘‘)
),
1,
1,
‘‘
),
[sex] = stuff(
(
SELECT
‘,‘ + [sex]
FROM
tabla AS a
WHERE
a.id = b.id FOR xml path (‘‘)
),
1,
1,
‘‘
)
FROM
tabla AS b
GROUP BY
id

常用sql 汇总--- SQL 根据一个字段分组后，把另外几个字段的字符串累加连接起来