Polymorphism in SQL database tables?

Question

I currently have multiple tables in my database which consist of the same \'basic fields\' like:

name character varying(100),
description text,
url character         


        

Answer 1

Question is quite old but for modern postresql versions it's also worth considering using json/jsonb/hstore type. For example:

create table some_table (
    name character varying(100),
    description text,
    url character varying(255),
    additional_data json
);