Database Management

1. A company database needs to store information about employees , departments, and children of employees. Employees work in a department; a child must be identified uniquely when the parent (who is an employee; assume that only one parent works for the company) is known.

Create an ER Diagram

2. .A facebook user can create a status post. Users can put multiple comments under a status post. User can also share the status post multiple times. However, user can only make 1 react per status post, but a status post can have multiple reacts.

Create an ER Diagram