sql - NOT EXIST in correalted subquery returns too many rows -


i want select records n number of conditions matches associated table.

i try accomplish this

select v.id, name visitors v left join trackings t on t.visitor_id = v.id      v.app_id = 'a0i'      , (         (not exists (             select v.id             trackings not_t              v.id = not_t.visitor_id , field = 'admin'         ))         or (t.field = 'app_name' , t.string_value ilike 'gitchecker')         or (t.field = 'users_created' , t.integer_value > 0)     )     group v.id     having count(*) = 3 -- <number of conditions>

which works fine, unless try express 'unknown' condition through not exists subquery. subquery returns many rows, not seem filtered on v.id = not_t.visitor_id

any ideas?

i'm not sure why version not working. might having clause should 2 or 3 depending on match.

but, why not phrase logic this?

select v.id, name visitors v join      trackings t       on t.visitor_id = v.id v.app_id = 'a0i'  group v.id, name having sum( (t.field = 'app_name' , t.string_value ilike 'gitchecker')::int) > 0) ,        sum( (t.field = 'users_created' , t.integer_value > 0)::int) > 0 ,        sum( (t.field = 'admin')::int) = 0;

note left join unnecessary because conditions require matches.

i find these types of queries -- set-with-in-set queries -- group by , having versatile way express conditions.


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