Customers
    ID
    First name
    Last name
    Street Address
    City
    Province/State
    Postal Code
    Phone Number
    Email Address

Purpose:
Tracks who the client is and how to contact them.

Relationship:
One customer can have multiple contracts.

Contracts
    Contract ID (unique identifier)
    Customer ID (links to the customer)
    Building Street Address
    City
    Province/State
    Postal Code
    Scheduled Date
    Scheduled Time
    Employee ID (employee assigned to the job)

Purpose:
Tracks each job being performed.

Relationships:
Each contract belongs to one customer.
Each contract is handled by one employee.
Each contract can contain multiple rooms.

Rooms
    Room ID
    Contract ID
    Room Name
    Paint ID

Purpose:
Tracks individual areas being painted for each contract.

Relationships:
Each room belongs to one contract.
Each room uses one paint color.

Inventory
    Paint ID
    Paint Name
    Cost Per Can
    Quantity

Purpose:
Tracks paint options and pricing so customers know how much each paint can costs.

Relationships:
One paint type can be used in many rooms.

Employees
    Employee ID
    First Name
    Last Name
    Address
    Postal Code
    Hire Date
    Salary

Purpose:
Tracks the staff doing the work.

Relationship:
One employee can be assigned to multiple contracts.
Each contract has exactly one employee.