试题详情
- 单项选择题 Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEES EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE NEW_EMPLOYEES EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2(60) Which DELETE statement is valid?()
A、DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);
B、DELETE * FROM employees WHERE 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 employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE last_name ='Carrey');
- C
关注下方微信公众号,在线模考后查看
热门试题
- You want
- Given a
- The STUDENT_GRADES
- Which two̳
- 以下关于ORACLE物理和逻辑存储结构的
- Before a
- Given: Whatistheres
- An index called ORD
- 在Oracle中,表分区方式()建议分区
- At design̳
- You are tuning RMAN
- Examinethestructureo
- Given: What is
- Which three are prop
- Given: What is
- Which three
- You are u
- You establishe
- The STUDENT_GRADES
- What does the FORCE