试题详情
- 单项选择题 Examine the data of the EMPLOYEES table. EMPLOYEES (EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID)
Evaluate this SQL statement: 
What is its output?（） A、
B、
C、
D、
E、 The SQL statement produces an error.
关注下方微信公众号，在线模考后查看
热门试题
- Which statement expl
- Evaluate the set of
- Evaluate the SQL st
- ClicktheExhibitbutto
- ClicktheExhibitbutto
- Which best describes
- Examine the structu
- You need to calculat
- Evaluate this SQL s
- Which SQL statement
- ClicktheExhibitbutto
- You are granted the
- Which four are attri
- Which two are true a
- In which two cases w
- Examine the descrip
- Which two statements
- The user Sue issues
- Which constraint can
- What does the FORCE