Users

Column Name	Data Type	Details
id	integer	not null, PK
username	string	not null, U
email	string	not null, U
Biography	string	not null
profile_pic	string	not null

• U is unique

Posts

Column Name	Data Type	Details
id	integer	not null, PK
user_Id	integer	not null, FK
caption	string	not null
post_url	string	not null
timestamp	datetime	not null

• user_Id references Users table one to many relationship (a user can make many posts, but a post belongs to one user)

Comments

Column Name	Data Type	Details
id	integer	not null, PK
comment	string	not null
user_Id	integer	not null, FK
post_Id	integer	not null, FK
timestamp	datetime	not null

• user_Id references the Users table one to many relationship (a user can make many comments, but a comment belongs to one user)
• post_Id references the Posts table one to many relationship (a post can have many comments, but a comment belongs to one post)

Likes

Column Name	Data Type	Details
user_Id	integer	not null, FK
post_Id	integer	not null, PK

• user_Id references the Users table many to many relationship (users can make likes on many posts)
• post_Id references the Posts table many to many relationship (posts can have many likes created by many users)