【摘要】 从关系数据库理论的角度出发 ,讨论了双向可变表的设计原则 ,并通过一个实例给出了PowerBuilder开发环境下的一种设计实现方案更多还原

【Abstract】 This article is about the principle of design for bidirectional mutable form,which is expounded from the angle of the theory of RDB A scheme to put this design into application is offered through an example,which is given in the environment of powerbuilder development更多还原