Build an Enhanced ERD using the below business description. Granite Sales Company keeps information on employees and the departments they work in.  For each department, the DepartmentID, Name, MailboxNumber, and PhoneExtension is tracked.  A department can have many assigned employees, and each employee is assigned to only one department.  Employees can be salaried employees, hourly employees, or contract employees.  All employees are assigned an EmployeeID.  This is kept along with the employee’s FirstName, LastName and Address (StreetAddress, City, State, & Zip).  For hourly employees, HourlyWage and WeeklyHours are stored (e.g, the company may target 40 hours / week for some, 32 hours / week for others).  Some salaried employees are salespeople that can earn a commission in addition to the base salary.  For all salaried employees, the AnnualSalary amount is recorded in the system. For salespeople, their commission percentage on sales (SalesCommission) and commission percentage on profits (ProfitCommission) are stored in the system.  For example, John is a salesperson with a base salary of $50,000 per year plus 2% commission on the sales price for all sales he makes plus another 5% of the profit on each of those sales.  For contract employees, the BillingRate, BeginDate, and EndDate of their contract are stored. Is this image right one? Could you give me verb of each relationships and weak & strong relation points?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Build an Enhanced ERD using the below business description.

Granite Sales Company keeps information on employees and the departments they work in.  For each department, the DepartmentID, Name, MailboxNumber, and PhoneExtension is tracked.  A department can have many assigned employees, and each employee is assigned to only one department.  Employees can be salaried employees, hourly employees, or contract employees.  All employees are assigned an EmployeeID.  This is kept along with the employee’s FirstName, LastName and Address (StreetAddress, City, State, & Zip).  For hourly employees, HourlyWage and WeeklyHours are stored (e.g, the company may target 40 hours / week for some, 32 hours / week for others).  Some salaried employees are salespeople that can earn a commission in addition to the base salary.  For all salaried employees, the AnnualSalary amount is recorded in the system. For salespeople, their commission percentage on sales (SalesCommission) and commission percentage on profits (ProfitCommission) are stored in the system.  For example, John is a salesperson with a base salary of $50,000 per year plus 2% commission on the sales price for all sales he makes plus another 5% of the profit on each of those sales.  For contract employees, the BillingRate, BeginDate, and EndDate of their contract are stored.

Is this image right one? Could you give me verb of each relationships and weak & strong relation points?

 

HOURLY
PK,FK EmployeelD
PK,FK DepartmentID
HourlyWage
HourlyHours
EMPLOYEE
PK EmployeelD
PK,FK DepartmentID
FirstName
LastName
StreetAddress
City
State
Zip
Employee Type
SALARIED
PK,FK EmployeelD
PK,FK DepartmentID
AnnualSalary
SALES PERSON
PK,FK EmployeelD
PK,FK DepartmentID
SalesCommision
ProfitCommision
8
DEPARTMENT
HPK DepartmentID
CONTRACT
PK,FK EmployeelD
PK,FK DepartmentID
BillingRate
BeginDate
EndDate
DepartmentName
MailboxNumber
PhoneExtension
Transcribed Image Text:HOURLY PK,FK EmployeelD PK,FK DepartmentID HourlyWage HourlyHours EMPLOYEE PK EmployeelD PK,FK DepartmentID FirstName LastName StreetAddress City State Zip Employee Type SALARIED PK,FK EmployeelD PK,FK DepartmentID AnnualSalary SALES PERSON PK,FK EmployeelD PK,FK DepartmentID SalesCommision ProfitCommision 8 DEPARTMENT HPK DepartmentID CONTRACT PK,FK EmployeelD PK,FK DepartmentID BillingRate BeginDate EndDate DepartmentName MailboxNumber PhoneExtension
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