Table users {
    id integer [pk, not null]
    username varchar(255) [not null]
    email varchar(255) [not null]
    created_at timestamptz [not null]
    profile_id integer
}

Table profiles {
    id integer [pk, not null]
    bio text
    created_at timestamptz [not null]
}

Table posts {
    id integer [pk, not null]
    user_id integer [not null]
    title varchar(255) [not null]
    body text
    published_at timestamptz
    view_count integer default 0

    Indexes {
        (user_id, title) [unique]
    }
}

Ref: users.profile_id > profiles.id