Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）
- A、Unique
- B、Check
- C、Referential
- D、Informational
正确答案:B
答案解析:有
微信扫一扫手机做题
多做题，通过考试没问题！
IBM认证考试
IBM认证考试
Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）
微信扫一扫手机做题
