SQL 分组后拼接字符串
时间：2022-03-10 17:41
with t as(
select ‘Charles‘ parent, ‘William‘ child union
select ‘Charles‘, ‘Harry‘ union
select ‘Anne‘, ‘Peter‘ union
select ‘Anne‘, ‘Zara‘ union
select ‘Andrew‘, ‘Beatrice‘ union
select ‘Andrew‘, ‘Eugenie‘
)
SELECT parent,
STUFF(
(
SELECT ‘,‘+ child FROM t a WHERE b.parent = a.parent FOR XML PATH(‘‘)
),1 ,1, ‘‘) children
FROM t b
GROUP BY parent
原表：
Parent |
Child |
| Charles | William |
| Charles | Harry |
| Anne | Peter |
| Anne | Zara |
| Andrew | Beatrice |
| Andrew | Eugenie |
处理后的结果：
Parent |
Children |
| Charles | William,Harry |
| Anne | Peter,Zara |
| Andrew | Eugenie,Beatrice |
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