如何在group_concat列上添加过滤条件？

Question

表格1

+----+--------+
| id | name   |
+----+--------+
|  2 | robin  |
|  3 | jyothi |
|  1 | angel  |
+----+--------+

表2

+----+---------+--------+
| id | hobbies | ref_id |
+----+---------+--------+
|  1 | walking |      1 |
|  2 | chating |      1 |
|  3 | reading |      2 |
|  4 | walking |      2 |
+----+---------+--------+

我想要名字和他们的爱好,他们的爱好是"行走"或名字是'知更鸟'

+----+-----------------+
| name | hobbies       | 
+----+-----------------+
|  1 | walking,chating |      
|  3 | reading,surfing |    
+----+-----------------+

二手查询:

select name, group_concat(hobbies) as all_hobbies
from test1,test2
where test1.id = test2.ref_id 
and test1.id in (select ref_id
              from test2
              where hobbies = 'walking')
group by name

我不想使用子查询或将整个结果保存为虚拟表并通过where子句搜索all_hobbies.我想通过where子句或某种方式完成group_concat列,因为它增加了我的SQL_JOIN_SZIE

我不能在这里使用,因为它必须作为或条件,例如:

爱好是'走路'还是名字'知更鸟'

Answer 1

我没有在这台机器上安装mysql,但尝试这个查询,我认为它应该工作.您可以将该HAVING条款视为WHERE您的条款GROUP BY.

select name, group_concat(hobbies) as all_hobbies
from test1,test2
where test1.id = test2.ref_id and test1.name = 'robin'
group by name
having all_hobbies like '%walking%'