sql - 如何在sql查询中根据ID将行值设置为一个字段

Question

我有一张名为“PERSON”的桌子

GROUP_ID  PERSON_NAME
1001       ALEX
1002       MATHEW
1001       GEORGE
1002       THOMAS
1001       JAMES

我需要像下面这样的输出"|"

GROUP_ID   PERSON_NAME
1001       ALEX|GEORGE|JAMES
1002       THOMAS|MATHEW

Answer 1

SELECT  a.[GROUP_ID], 
        SUBSTRING(d.Names,1, LEN(d.Names) - 1) NamesList
FROM
        (
            SELECT DISTINCT [GROUP_ID]
            FROM Table1
        ) a
        CROSS APPLY
        (
            SELECT [PERSON_NAME] + '|' 
            FROM table1 AS B 
            WHERE A.[GROUP_ID] = B.[GROUP_ID] 
            FOR XML PATH('')
        ) D (Names) 

• SQLFiddle 演示

或者

SELECT [GROUP_ID],
       STUFF(
           (SELECT '|' + [PERSON_NAME]
            FROM Table1
            WHERE [GROUP_ID] = a.[GROUP_ID]
            FOR XML PATH (''))
            , 1, 1, '')  AS NamesList
FROM Table1 AS a
GROUP BY [GROUP_ID]

• SQLFiddle 演示