mysql - 为 sql 选择中的列返回多个值

Question

例如这是我的表（复制）。

id  customer        product 
1   Tizag           Pen 
4   Gerald Garner   19" LCD Screen  
5   Tizag           19" LCD Screen  
6   Gerald Garner   clock

我想选择整个表。结果必须是这样的：

customer        product 
Tizag           Pen,19" LCD Screen
Gerald Garner   19" LCD Screen,clock

我怎样才能做到这一点？

Answer 1

Select customer ,
Group_Concat(product SEPARATOR ',') as Product
from TableName group by customer    

SQL 小提琴演示

Answer 2

无需使用“，”作为分隔符，默认自带

 select customer, group_concat(product) as product
 from tableName
 group by customer