试题详情
- 单项选择题 You own a table called EMPLOYEES with this table structure: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE What happens when you execute this DELETE statement? DELETE employees; （）
A、You get an error because of a primary key violation.
B、The data and structure of the EMPLOYEES table are deleted.
C、The data in the EMPLOYEES table is deleted but not the structure.
D、You get an error because the statement is not syntactically correct.
关注下方微信公众号，在线模考后查看
热门试题
- ClicktheExhibitbutto
- Which three statemen
- The STUDENT_GRADES
- Which two statements
- What is true about u
- Which three statemen
- Which SQL statement
- Which is an iSQL*Plu
- Which two statements
- Examine the structu
- The EMPLOYEES table
- Which clause should
- ClicktheExhibitbutto
- Which four are corre
- The DBA issues this
- In which four clause
- Which two statements
- What is true about s
- Which syntax turns a
- You need to modify t