ZF-100-500 Free Dumps Study Materials
Question 27: Celina works as a Database Administrator for Tech Mart Inc. The company uses an Oracle database.
The database contains a table named Employees. Following is the structure of the table:
EmpID NUMBER (5) PRIMARY KEY
EmpName VARCHAR2 (35) NOT NULL
Salary NUMBER (9, 2) NOT NULL
Commission NUMBER (4, 2)
ManagerName VARCHAR2 (25)
ManagerID NUMBER (5)
Celina wants to display the names of employees and their managers, using a self join. Which of the
following SQL statements will she use to accomplish this?
Each correct answer represents a complete solution. Choose two.
A. SELECT e.EmpName, m.ManagerName
FROM Employees e, Employeesm
WHERE e.EmpID = m.ManagerID;
B. SELECT e.EmpName, m.ManagerName
FROM Employees e INNER JOIN Employeesm
ON e.EmpID = m.ManagerID;
C. SELECT e.EmpName, m.ManagerName
FROM Employees e LEFT OUTER JOIN Employees m
ON e.EmpID = m.ManagerID;
D. SELECT e.EmpName, m.ManagerName
FROM Employees e SELF JOIN Employeesm
ON e.EmpID = m.ManagerID;
Correct Answer: A,B