首页 > 数据库 > Oracle > OCP 1Z0-051-130
You want to display all the employee names and their corresponding manager names. Evaluate the following query:
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
D. only RIGHT OUTER JOIN
答案(C)
来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/17013648/viewspace-1167124/ ,如需转载,请注明出处,否则将追究法律责任。