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.
- C,D,E
关注下方微信公众号，在线模考后查看
热门试题