如何在一个单元格行中存储具有相同名称但不同 ID 的值？

Question

insert into demo values ('1','name1','Text1');
insert into demo values ('2','name1','Text2');
insert into demo values ('3','name1','Text3');

我怎样才能得到这样的一行？

id | name  | value
1  | name1 | Text1 + Text2 + Text3

Answer 1

MYSQL:

使用GROUP_CONCAT函数。

SELECT MIN(id), name, GROUP_CONCAT(DISTINCT Value SEPARATOR ' + ') AS Value
FROM demo
GROUP BY name

演示

http://sqlfiddle.com/#!9/d75aca/2

MSSQL:

SELECT MIN(id), name,
       Value = STUFF((
          SELECT '+ ' + di.value + ' '
          FROM demo di
          WHERE d.name = di.name
          GROUP BY di.value
          FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 1, '')
FROM demo d
GROUP BY name

演示：

http://sqlfiddle.com/#!18/d75ac/2

Answer 2

甲骨文：

SELECT MIN(ID), NAME, LISTAGG(VALUE,'+') WITHIN GROUP (ORDER BY NAME) AS VALUE
FROM DEMO 
GROUP BY NAME

如何在一个单元格行中存储具有相同名称但不同 ID 的值？

how to store in one cell rows value what have the same name but different id?

mysql

sql

string-aggregation