I know how to use group_concat with Sqlite, to do the following:
id - f1 - f2 - f3
1 - 1 - a - NULL
2 - 1 - b - NULL
3 - 2 - c - NULL
4 - 2 - d - NULL
select id, f1, group_concat(f2), f3 from table group by f1
result:
2 - 1 - a,b - NULL
4 - 2 - c,d - NULL
as you can see, the ID's 1 and 3 are dropped, which is the expected behaviour. But I would need:
1 - 1 - a - a,b
2 - 1 - b - a,b
3 - 2 - c - c,d
4 - 2 - d - c,d
so, every record returned, and another field (f3) updated with the group_concat
any idea how this could be done in Sqlite?
Thank you
Not sure WHY you want this, but here goes:
select
outer_t.id
,outer_t.f1
,outer_t.f2
,inline_view.groupfoo
from t as outer_t
left join (
select
f1
,group_concat(f2) as groupfoo
from t
group by f1
) inline_view on inline_view.f1 = outer_t.f1
;