I have to write an ERD diagram that shows the relationships between Departments, Users, and Letters.
1) Each department can have multiple users.
2) Each user can have multiple departments.
3) A letter belongs to a user and a department.
and then I have to write a stored proc that takes a UserID and returns all of the columns from the Department and Letter tables for each Letter for the UserID that was passed to the stored procedure.
any help will be greatly appreciated