Three important conceptions-function dependence, normalization and dissolution of data scheme-are analysed. Their directive action for design of relational data model is pointed out as well.
避开复杂繁琐的数学推导，分析了关系数据库理论中的函数依赖，数据模式的规范化及其分解这三个重要概念，指出了它们对关系数据模型设计的指导作用。
A "business policy" then, is a type of business directive that expresses the course of action that the business wants to have happen within a set of business conditions.
“业务策略”是一种业务指示，表述在一组业务条件下企业希望发生的行动过程。
Here is the second version of the directive in action.
下面是指令操作演示的第二版。
Here is the second version of the directive in action.
下面是指令操作演示的第二版。
应用推荐