What SQL Script in Postgres to return the fields that belong to PK? [closed]

In my searches I found several ways to do this script, I want to show here a very simple way to return this data, this to help people who are starting

 select kcu.table_schema,
           kcu.table_name,
           tco.constraint_name,
           kcu.ordinal_position as position,
           kcu.column_name as key_column
    from information_schema.table_constraints tco
    join information_schema.key_column_usage kcu 
         on kcu.constraint_name = tco.constraint_name
         and kcu.constraint_schema = tco.constraint_schema
         and kcu.constraint_name = tco.constraint_name
    where tco.constraint_type = 'PRIMARY KEY' and 
           kcu.table_name = 'sua_tabela'
    order by kcu.table_schema,
             kcu.table_name,
             position;