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Question 1: Examine the structure of the EMPLOYEES table: There is a parent/child relationship between EMPLOYEE_ID and MANAGER_ID. You want to display the name, joining date, and manager for all employees. Newly hired employees are yet to be assigned a department or a manager. For them, 'No Manager' should be displayed in the MANAGER column. Which SQL query gets the required output? A. SELECT e.last_name, e.hire_date, NVL(m.last_name, 'No Manager') ManagerFROM employees e RIGHT OUTER JOIN employees mON (e.manager_id = m.employee_id); B. SELECT e.last_name, e.hire_date, NVL(m.last_name, 'No Manager') ManagerFROM employees e JOIN employees mON (e.manager_id = m.employee_id); C. SELECT e.last_name, e.hire_date, NVL(m.last_name, 'No Manager') ManagerFROM employees e NATURAL JOIN employees mON (e.manager_id = m.employee_id). D. SELECT e.last_name, e.hire_date, NVL(m.last_name, 'No Manager') ManagerFROM employees e LEFT OUTER JOIN employees mON (e.manager_id = m.employee_id); Correct Answer: D
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