Consider the following database schemas:
|
EMPLOYEE |
|
Emp_ID Emp_Name Emp_Phone Dept_ID |
|
DEPARTMENT |
|
Dept_ID Dept_Name Emp_Count Dept_Head |
In which schema, is the Dept_ID attribute a primary key?
1
EMPLOYEE
2
DEPARTMENT
3
Both EMPLOYEE and DEPARTMENT
4
In neither EMPLOYEE nor DEPARTMENT