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Oracle Datbase 12c SQL Exam Questions

Oracle

Oracle Datbase 12c SQL

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Question 25:

Examine the structure of the EMPLOYEES table. 
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There is a parent/child relationship between EMPLOYEE_ID and MANAGER_ID. You want to display the last names and manager IDs of employees who work for the same manager as the employee whose EMPLOYEE_ID is 123. Which query provides the correct output? 

Answer options:

A. SELECT e.last_name, m.manager_id FROM employees e RIGHT OUTER JOIN employees m on (e.manager_id = m.employee_id) AND e.employee_id = 123;
B. SELECT e.last_name, m.manager_id FROM employees e LEFT OUTER JOIN employees m on (e.employee_id = m.manager_id) WHERE e.employee_id = 123;
C. SELECT e.last_name, e.manager_id FROM employees e RIGHT OUTER JOIN employees m on (e.employee_id = m.employee_id) WHERE e.employee_id = 123;
D. SELECT m.last_name, e.manager_id FROM employees e LEFT OUTER JOIN employees m on (e.manager_id = m.manager_id) WHERE e.employee_id = 123;