candidate key中文什么意思
侯选码
候选关键字
候选键(辅键)
候选键码
+更多解释...- candidate: n. 1.候选人；候补人 (for) ...
- key: n. 礁，暗礁(＝cay, quay ...
- candidate for: 候选人,人选; 如果正在学习
例句与用法
- Evaluation to candidate keys by functional dependencies in the database
数据库中利用函数依赖求解候选码的方法 - The tool makes creating these keys easy by automatically providing a lookup on the valid candidate keys defined in the columns view
该工具通过自动提供查找columns视图中定义的有效备选键，从而很容易地创建这些键。 - The reason is that the results are unpredictable unless you always group by a primary or candidate key value because you cannot know which value from the non - grouped data will be selected
这个原因是因为结果是不可预知的，除非你允许以主关键字或是候选关键字来作为分组，因为你无法知道which将从哪能一个非分组的数据作选取。
百科释义
In the relational model of databases, a candidate key of a relation is a minimal superkey for that relation; that is, a set of attributes such that
详细百科解释
