【摘要】 本文详细讨论了基于超图的关系模式的有关候选关键字的某些理论,给出了相应的定理.圆满地解决了关系模式全部候选关键字的求解问题,具体地给出了以递归形式的求全部候选关键字的新算法.更多还原

【Abstract】 In this paper, some theories on candidate keys of relation schema basedon hypergraph are discussed in detail. The problem to find out all candidate keys of relation schema is solved satisfactorily. And a new recursive algorithm of finding out all candidate keys is given.更多还原