where on multiple join postgresql

Question

I have problem when query using postgresql I have several tables:

numbers:

id	phone
1	08211111
2	08211112

domains:

id	name	is_blacklisted
1	abc.com	0
2	123.com	0
3	456.com	1

domain_groups:

id	name
1	alphabet
2	numeric

domain_group_domains:

domain_group_id	domain_id
1	1
2	2
2	3

number_domain_history:

number_id	domain_id	times
1	1	1
1	2	2
3	3	2

number_domain_group_history:

number_id	domain_group_id	times
1	1	1
1	2	2
3	2	2

if I want to select number by domain history where domain.is_blacklisted = 0:

select numbers.id from numbers
left join number_domain_history on number_domain_history.number_id = numbers.id
where number_domain_history.domain_id not in (select domain_id from domains where is_blacklisted = 1)
group by numbers.id
limit 1000

The problem is how I can search number by domain_group that perform same blacklist since blacklisted only available in number_domain_history?

I have try with:

select numbers.id from numbers
left join number_domain_history on number_domain_history.number_id = numbers.id
left join number_domain_group_history on number_domain_group_history.
where number_domain_history.domain_id not in (select domain_id from domains where is_blacklisted = 1)
group by numbers.id
limit 1000

But the result is not like what I expect to return, I still get data from domain_group that the domain already blacklisted.

Is there any workaround?

Answer 1

if I want to select number by domain history where domain.is_blacklisted = 0:

You only need three tables:

1. numbers
2. domains
3. number_domain_history

You can use a simple inner join:

select n.phone
from numbers n 
inner join number_domain_history ndh on ndh.number_id=n.id
inner join domains d on ndh.domain_id=d.id
where d.is_blacklisted=0
group by n.phone;

Result:

phone
08211111

Demo

How can I perform search by times on number_domain_group_history ? ex: number_domains_group_history.times > 0

Simple , add another join condition.

inner join number_domain_group_history ndgh on ndgh.number_id=n.id


select n.phone
from numbers n 
inner join number_domain_history ndh on ndh.number_id=n.id
inner join domains d on ndh.domain_id=d.id
inner join number_domain_group_history ndgh on ndgh.number_id=n.id
where d.is_blacklisted=0
and ndgh.times > 0
group by n.phone;

Demo