What type of constraint can be used to ensure that, in any given row in a table, the value of one column never exceeds the value of another column?（）
- A、Check
- B、Range
- C、Referential
- D、Informational
正确答案:A
答案解析:有
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IBM认证考试
IBM认证考试
What type of constraint can be used to ensure that, in any given row in a table, the value of one column never exceeds the value of another column?（）
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