数据库逻辑设计 meaning in English

logical database design

The system design includes information model , function design and dada - base logical relation . the information model is established by entity - relation method , and the e - r picture is ploted , and the in - out diagram is gived out ; the fuction designed is established by idef0 method , the subsystems are designed according to the model in detail , we give out the explaining document and explain the calculation method for the model ; we design the data - base logical relation by the above models , decide the distributing and partition the relation diagram of the data - base , then define the logical structure of the diagrams
其中信息建模采用实体-联系的方法建立系统的信息模型，并用idef1x图表示出该信息模型，同时给出电泵物资管理系统输入输出信息表；功能设计用idef _ 0方法建立电泵物资管理系统分系统功能模型，参照功能模型对内部各子系统进行详细设计，给出分系统功能模块的详细说明书及相应功能算法描述；数据库逻辑设计依据系统分析结果、信息模型及功能模型，确定电泵物资管理系统数据库分布，划分数据库内部关系表，定义表的具体逻辑结构。