ER图 关系模型一个教员只讲授一门课程,一门课程可由多个教员教授,一个学生学习多门课程,每门课程有多个学生学习.请画ER

ER图 关系模型
一个教员只讲授一门课程,一门课程可由多个教员教授,一个学生学习多门课程,每门课程有多个学生学习.请画ER图 并构造关系模型
教员:职工号,姓名,年龄,职称
学生:学好,姓名,年龄,性别
课程:课程号,课程名,学时数
PS:ER图我会画

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