SQL

grant permission in postgres

GRANT ALL PRIVILEGES ON DATABASE db_name TO username;

list all permissions on a table in postgres

SELECT grantee, privilege_type 
FROM information_schema.role_table_grants 
WHERE table_name='mytable'

Check user permissions on postgres database

select * from information_schema.role_table_grants where grantee='<user>';

postgres user permissions

grant select, insert, <other_permissions> on <table> to <role>;

postgresql user permissions to database

sudo -u postgres 
psqlpostgres=# create database mydb;
postgres=# create user myuser with encrypted password 'mypass';
postgres=# grant all privileges on database mydb to myuser;