--Tool
SELECT
    tc.table_schema, 
    tc.constraint_name, 
    tc.table_name, 
    kcu.column_name, 
    ccu.table_schema AS foreign_table_schema,
    ccu.table_name AS foreign_table_name,
    ccu.column_name AS foreign_column_name 
FROM 
    information_schema.table_constraints AS tc 
    JOIN information_schema.key_column_usage AS kcu
      ON tc.constraint_name = kcu.constraint_name
      AND tc.table_schema = kcu.table_schema
    JOIN information_schema.constraint_column_usage AS ccu
      ON ccu.constraint_name = tc.constraint_name
      AND ccu.table_schema = tc.table_schema
WHERE tc.constraint_type = 'FOREIGN KEY'
      AND ccu.table_name = 'product'; -- admin/client

--List All views?
SELECT table_name, table_type FROM information_schema.tables WHERE table_schema='public' ORDER BY table_type;

\d+ pts --> Show pts(maybe a table or view) creation

\dv -> List Views

\dv => List all View
\dt => List all Table
\ds => List all Sequence
\dn => List all Schemas

\dT+ enum-type-name  --\dT+ log_action 


SELECT * 
FROM t1 LEFT JOIN t2 USING (num); <=  `USING'