最新OCP考试题库：11g-1Z0-051-第17题

最新OCP考试题库：11g-1Z0-051-第17题，完整题库请点击这里联系老师咨询了解

17、Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables:

Which DELETE statement is valid?

A. DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);

B. DELETE * FROM employeesWHERE employee_id=(SELECT employee_id FROM new_employees);

C. DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = ‘Carrey’);

D. DELETE * FROM employeesWHERE employee_id IN (SELECT employee_idFROM new_employeesWHERE name = ‘Carrey’);

Answer: C

试题解析：

delete删除表中记录是使用delete form表名，而不是delete * form 表名

另外子查询中必须为返回单条的记录，所以C正确。