OCP-1Z0-051 第130題 LEFT OUTER JOIN的用法
You want to display all the employee names and their corresponding manager names.
Evaluate the following query:
SQL> SELECT e.employee_name "EMP NAME", m.employee_name "MGR NAME"
FROM employees e ______________ employees m
ON e.manager_id = m.employee_id;
Which JOIN option can be used in the blank in the above query to get the required output?
A. only inner JOIN
B. only FULL OUTER JOIN
C. only LEFT OUTER JOIN
答案：C
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