按照任务的目的和要求，设计了其数据库系统结构：定义数据、表、创建数据关系模型及设计数据结构。
According to the demands, the structure of the database has been designed: defining data, defining table, building relation data model and designing the data structure.
按照任务的目的和要求，设计了其数据库系统结构：定义数据、表、创建数据关系模型及设计数据结构。
According to the demands, the structure of the database has been designed: defining data, defining table, building relation data model and designing the data structure.
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