We define the analytical graph from which we deduce a series of properties and obtain a theorem for evaluating the set of keys in relational schema.
我们定义了分析图，推导了一系列性质，并由此得到关系模式的关键字集的求解定理。
Finally we point out that there are many other important applications of analytical graph in relational database systems.
最后，我们指出分析图在关系数据库系统中的许多其它重要应用。
应用推荐