Relational Schema Employee (EmployeeID, FirstName, LastName, Email, Phone, HireDate, Salary, #DepartmentID) Department (DepartmentID, DepartmentName, #ManagerID) Project (ProjectID, ProjectName, StartDate, EndDate, Budget) Employee_Project (#EmployeeID, #ProjectID, Role, AssignmentDate) Explanation of Relationships: Employee (EmployeeID) is the primary key. Department (DepartmentID) is the primary key. Project (ProjectID) is the primary key. Employee_Project (#EmployeeID, #ProjectID) is a composite primary key (many-to-many relationship between Employee and Project). Employee(#DepartmentID) REFERENCES Department(DepartmentID) : An employee belongs to a department. Department(#ManagerID) REFERENCES Employee(EmployeeID) : A manager is an employee. Employee_Project(#EmployeeID) REFERENCES Employee(EmployeeID) Employee_Project(#ProjectID) REFERENCES Project(ProjectID) QUESTION Which query displays employees along with their department name? A) SELECT * FROM Employee INNER JOIN Department; B) SELECT Employee.FirstName, Employee.LastName, Department.DepartmentName FROM Employee JOIN Department ON Employee.DepartmentID = Department.DepartmentID; C) SELECT FirstName, LastName FROM Employee, Department; D) SELECT Employee.FirstName, Employee.LastName, Department.DepartmentName FROM Employee RIGHT JOIN Department;

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Relational Schema Employee (EmployeeID, FirstName, LastName, Email, Phone, Hire...

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Relational Schema

Employee (EmployeeID, FirstName, LastName, Email, Phone, HireDate, Salary, #DepartmentID)

Department (DepartmentID, DepartmentName, #ManagerID)

Project (ProjectID, ProjectName, StartDate, EndDate, Budget)

Employee_Project (#EmployeeID, #ProjectID, Role, AssignmentDate)

Explanation of Relationships:

Employee (EmployeeID) is the primary key.
Department (DepartmentID) is the primary key.
Project (ProjectID) is the primary key.
Employee_Project (#EmployeeID, #ProjectID) is a composite primary key (many-to-many relationship between Employee and Project).
Employee(#DepartmentID) REFERENCES Department(DepartmentID): An employee belongs to a department.
Department(#ManagerID) REFERENCES Employee(EmployeeID): A manager is an employee.
Employee_Project(#EmployeeID) REFERENCES Employee(EmployeeID)
Employee_Project(#ProjectID) REFERENCES Project(ProjectID)

QUESTION

Which query displays employees along with their department name?

A) SELECT * FROM Employee INNER JOIN Department;

SELECT Employee.FirstName, Employee.LastName, Department.DepartmentName FROM Employee JOIN Department ON Employee.DepartmentID = Department.DepartmentID;

C) SELECT FirstName, LastName FROM Employee, Department;

D) SELECT Employee.FirstName, Employee.LastName, Department.DepartmentName FROM Employee RIGHT JOIN Department;

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