Question

When creating a database what happens if one table only contains 2 primary keys from other tables, i’m assuming they’re both foreign keys. Does there have to be a primary key in the table?

Answer 1

A Table doesn’t necessarily need to have a primary key associated. It i completely valid as follows

Table_Album

pkey | name
1    | name1
2    | name2

Table_Song

pkey | name
1    | song1
2    | song2
3    | song3

You can then have a table which states

Table_Album_Song_Map

id | Album | Song  # Here id is just row number and not primary key
1  | name1 | song1
2  | name1 | song2
3  | name2 | song3

Hope that helps