Question

I’m currently running the following query:

SELECT * from people WHERE id = 4;

on the following table:

id       name          state   age
-----------------------------------
1       tony jones     CA      22
2       Sue Smith      FL      50
3       Alex Guam      AL      44
4       tony jones     SC      32
5       tony jones     OH      12
6       alex guam      RI      33
7       tony Jones     CO      17

I’d like to also return a list of other states that a person by that name lives in.

So in my query example I have id 4 for “tony jones” – I should also receive an “other_states” list of CA,OH,CO.

Is it possible in the one query or do I need to do a separate select after the fact based on ‘name’ ?

Answer 1

This will give you what you are looking for:

select t.id,
       t.name,
       t.age,
       t.group_concat(distinct t.state order by t.state separator ', ') as other_states
from   the_table t
    inner join the_table u on t.name = u.name 
where  u.id = 4
group by t.id, t.name, t.age