Question

所以我有下表：

retailer    register    store
1           104         b
1           101         a
2           104         b
2           101         a
3           104         b
3           101         a

我希望查询表格以获得如下结果：

retailer  register  store  
1 _ 101, 104 _ a, b  
2 _ 101, 104 _ a, b  
3 _ 101, 104 _ a, b

Answer 1

您可以使用group_concat和group by

 select 
    retailer
 , group_concat(register ORDER BY registed ASC SEPARATOR ', ')
 , group_concat(store ORDER BY store ASC SEPARATOR ', ')
 from my_table 
 group by retailer

如果你需要saparator，你应该使用concat

 select 
      concat ( retailer
      , '_'
      ,  group_concat(register ORDER BY registed ASC SEPARATOR ', ')
      , '_'
      , group_concat(store ORDER BY store ASC SEPARATOR ', '))
 from my_table 
 group by retailer

Answer 2

您可以将group by和GROUP_CONCAT与ORDER BY和SEPERATOR

一起使用

select retailer, 
GROUP_CONCAT(register ORDER BY register DESC SEPARATOR ', ') AS register, 
GROUP_CONCAT(store ORDER BY store DESC SEPARATOR ', ') AS store
from my_table 
GROUP BY retailer

retailer  register  store  
   1      101, 104   a, b  
   2      101, 104   a, b  
   3      101, 104   a, b

MySql在结果中一起查询两个字段

2 个答案: