【简答题】在关系数据库的规范理论中,在执行“分解”时,必须遵守规范化原则:保持原有的依赖关系和 。
【简答题】在关系数据库的规范化理论中,在执行“分解”时,必须遵守的规范化规则:保持原有的依赖关系和 。
【单选题】When hostages and hostage takers were trapped by siege , some surprising things unfold.
【单选题】When hostages and hostage takers were trapped by siege , some surprising things unfold.