试题详情
- 多项选择题Which three statements correctly describe the functions and use of constraints? （）
A、Constraints provide data independence.
B、Constraints make complex queries easy.
C、Constraints enforce rules at the view level.
D、Constraints enforce rules at the table level.
E、Constraints prevent the deletion of a table if there are dependencies.
F、Constraints prevent the deletion of an index if there are dependencies.
关注下方微信公众号，在线模考后查看
热门试题
- Examinethestructureo
- In a SELECT statemen
- Which two statements
- A subquery can be us
- You own a table cal
- Examine the statemen
- The EMPLOYEES table
- TheDBAissuesthisSQLc
- You want to display
- You need to calculat
- Which four are attri
- Which are DML statem
- Examine the SQL sta
- Which SELECT stateme
- Which are DML statem
- What is true about s
- ClicktheExhibitbutto
- For which action can
- The EMP table conta
- You are the DBA for