将多行中的多个文本字段分组为一列[重复]

Posted 2023-05-08

【中文标题】将多行中的多个文本字段分组为一列[重复]

【英文标题】：GROUP multiple text fields from multiple rows into one column [duplicate]

【发布时间】：2018-06-11 13:37:12

【问题描述】：

我有如下声明：

SELECT *
FROM 
    (
    SELECT 123 AS id, 123445 AS OrderNr, '775-1x' AS Reference
    UNION ALL
    SELECT 123 AS id, 123445 AS OrderNr, '775-1xx' AS Reference
    UNION ALL
    SELECT 123 AS id, 123445 AS OrderNr, '775-1xxx' AS Reference
    ) AS SUB

结果应该是这样的：

SELECT *
FROM 
    (
    SELECT 123 AS id, 123445 AS OrderNr, '775-1x, 775-1xx, 775-1xxx' AS Reference
    ) AS SUB

【问题讨论】：

请包括您希望结果的显示方式。这将有助于确保我们理解您的问题。

【参考方案1】：

你似乎想要带有stuff() 函数的 xml 方法：

with sub as (
       SELECT 123 AS id, 123445 AS OrderNr, '775-1x' AS Reference
       UNION ALL
       SELECT 123 AS id, 123445 AS OrderNr, '775-1xx' AS Reference
       UNION ALL
       SELECT 123 AS id, 123445 AS OrderNr, '775-1xxx' AS Reference
)
select id, OrderNr,
       stuff( (select ','+Reference 
               from sub s1 
               where s1.id = s.id and s1.OrderNr = s.OrderNr
               for xml path('')
              ), 1, 1, ''
            ) as Reference
from sub s
group by id, OrderNr;