/SQL/Postgresql display subquery as json

Postgresql display subquery as json

// PostgreSQL >= 9.4 : to_json(), json_build_object(), json_object() and json_build_array(), 
// though it's verbose due to the need to name all the fields explicitly:

select
        json_build_object(
                'id', u.id,
                'name', u.name,
                'email', u.email,
                'user_role_id', u.user_role_id,
                'user_role', json_build_object(
                        'id', ur.id,
                        'name', ur.name,
                        'description', ur.description,
                        'duty_id', ur.duty_id,
                        'duty', json_build_object(
                                'id', d.id,
                                'name', d.name
                        )
                )
    )
from users u
inner join user_roles ur on ur.id = u.user_role_id
inner join role_duties d on d.id = ur.duty_id;

Source: stackoverflow.com

Postgresql display subquery as json

// joining 3 tables and nesting results as json, keys can be named arbitrarily

select
        json_build_object(
                'id', u.id,
                'name', u.name,
                'email', u.email,
                'user_role_id', u.user_role_id,
                'user_role', json_build_object(
                        'id', ur.id,
                        'name', ur.name,
                        'description', ur.description,
                        'duty_id', ur.duty_id,
                        'duty', json_build_object(
                                'id', d.id,
                                'name', d.name
                        )
                )
    )
from users u
inner join user_roles ur on ur.id = u.user_role_id
inner join role_duties d on d.id = ur.duty_id;

Source: stackoverflow.com

Similar codes

0 vote186 views1 answer
Restart postgresql.service Failed to restart postgresql.service: Unit not found.
SQL
0 vote216 views1 answer
"Hello User Name"
SQL
1 vote174 views1 answer
Data type and their numeric form
SQL
4 votes212 views4 answers
Mysql get date from datetime
SQL
0 vote197 views1 answer
Exectuer myssql .sql
SQL
0 vote199 views2 answers
Faster mysql imports
SQL
36 votes189 views6 answers
Delete from where sql
SQL
25 votes291 views6 answers
Change column name mysql
SQL
0 vote181 views1 answer
Object Information
SQL
0 vote228 views1 answer
T-SQL Create Trigger
SQL