Celina works as a Database Administrator for Tech Mart Inc.

Zend 100-500 Question Answer

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.

SELECT e.EmpName, m.ManagerName

FROM Employees e, Employeesm

WHERE e.EmpID = m.ManagerID;

SELECT e.EmpName, m.ManagerName

FROM Employees e INNER JOIN Employeesm

ON e.EmpID = m.ManagerID;

SELECT e.EmpName, m.ManagerName

FROM Employees e LEFT OUTER JOIN Employees m

ON e.EmpID = m.ManagerID;

SELECT e.EmpName, m.ManagerName

FROM Employees e SELF JOIN Employeesm