/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 vote114 views1 answer
Minecraft duping allowed servers
SQL
0 vote164 views1 answer
ORA-32794: cannot drop a system-generated sequence
SQL
4 votes154 views1 answer
Ms sql truncate table vs delete
SQL
0 vote122 views1 answer
First mysql
SQL
0 vote142 views1 answer
Mysql regex select
SQL
3 votes124 views2 answers
Oracle sql truncate table
SQL
1 vote206 views1 answer
How to select the nth row in a SQL database table?
SQL
0 vote133 views1 answer
Create-table-with-index-organization
SQL
0 vote137 views1 answer
Mysql show create db
SQL
2 votes121 views1 answer
Oracle number to percentage
SQL