问题
名词解释
数据库的完整性保护
答案
参考答案：
是保护数据结构不受损害，保证数据的正确性、有效性和一致性。
搜题请搜索小程序“爱下问搜题”
数据库的完整性保护
参考答案：
是保护数据结构不受损害，保证数据的正确性、有效性和一致性。
| 补全对话。 A: What do you think of the football match yesterday afternoon? B: Very exciting. __1__ A: It's a pity that I missed the first part of the match. B: __2__ A: Because someone knocked me off my bike on the way to school. B: __3__ A: Yes, my left leg got hurt. So I couldn't ride my bike. I had to walk slowly. B: __4__ A: When I got to the sports field, it was already three twenty. B: __5__ A: Yeah. It is a pity.
|