Question

I want to create a simple web app that will have a connection from users to items.
Let’s say each user will have some items assigned to him (in this case, series and episodes, and a lot of them).

How should I plan the database structure for a system like this one (tables, fields and so on)? It’s the first time I encounter such a case.

Answer 1

Looks like a typical M:N association.

create table person (
  id number not null primary key,
  username varchar not null, -- login
  -- email, etc
);

create table episode (
  id number not null primary key,
  ordinal number not null, -- which episode in the series
  name varchar not null, 
  -- whatever else, for instance, a link to series:
  -- series_id not null number foreign key referencing series(id)
);

-- the link table you asked about
create table person_x_episode (
  person_id number not null foreign key referencing person(id),
  episode_id number not null foreign key referencing episode(id),
  -- whatever else, like seen date, rating, etc
);

If you need series and seasons subdivision, or groups of users, etc, you’ll have more tables.