说明：  SQL 选修课程管理系统.包括需求分析,E-R图设计,设计关系模式,系统结构图. 调查学校教务处，设计用于管理全校学生选修课活动的系统。主要功能有： 全校选修计划课程管理； 全校选修开课课程管理； 全校学生选课管理； 全校选修课成绩管理； 打印报表
(SQL elective courses in management systems. Including needs analysis, ER design, design pattern of relationships, the system structure. Investigations into school of the Registrar Office, designed for use in the management of all activities of the students elective system. The main features are: school elective program management school elective course curriculum management school student course management school elective performance management print statements)