Consider a database schema for a social media platform with three tables:

users

posts

likes

The users table has the following columns:

integer column user$\_$id $($primary key$)$

text column username

The posts table has the following columns:

integer column post$\_$id $($primary key$)$

integer column user$\_$id references the user$\_$id column of the users table $($foreign key$)$

text column post$\_$content

The likes table has the following columns:

integer column like$\_$id $($primary key$)$

integer column user$\_$id references the user$\_$id column of the users table $($foreign key$)$

integer column post$\_$id references the post$\_$id column of the likes table $($foreign key$)$