Postgres to fetch the list having comma separated values

Question

I am working on Postgres SQL and having below join query, when I execute this query I get two or 3 records for each employee, because each employee has 3 different types of emai

Answer 1

Aggregate by employee and use string_agg:

select
    c.employee_id,         -- or just c.* assuming employee_id is a PK
    string_agg(ce.email, ',') as emails
from root.employee c
full outer join root.employee_email ce
    on c.employee_id = ce.employee_id
group by
    c.employee_id
order by
    c.employee_id
limit 1000
offset 0;