ER图 on Lalalala-yeye's Bloghttps://Lalalala-yeye.github.io/lalalalalalaal/tags/er%E5%9B%BE/Recent content in ER图 on Lalalala-yeye's BlogHugo -- 0.159.1zh-cn©1999 Lalalala-yeye&rsquo;s BlogSun, 08 Mar 2026 00:00:00 +0800学校概念模型 E-R 图https://Lalalala-yeye.github.io/lalalalalalaal/post/school-er-diagram/Sun, 08 Mar 2026 00:00:00 +0800https://Lalalala-yeye.github.io/lalalalalalaal/post/school-er-diagram/<p>根据题意：学校有若干系，每系有若干班级和教研室，每教研室有若干教员，教授/副教授各带若干研究生，每班有若干学生，学生与课程为多对多选修关系。</p>