我对数据库建模感到困惑，我的要求是
我想要实现
以下两个模式colleges(id,name)
col_course_relation(colleges.id,courses.id)
courses(id,stream,degree,coursename)
课程示例可能
(1,"Engineering","Bachelor of Engineering","Computer Science & Engineering")
(2,"Engineering","Master of Engineering","Computer Science & Engineering")
(3,"Engineering","Bachelor of Technology,"Computer Science & Engineering")
(4,"Engineering","Master of Technology","Computer Science & Engineering")
为课程表使用普通表单是否更好，或者我可以为所有列创建索引
如果我进行规范化，则架构变为
colleges(id,name)
col_course_relation(colleges.id,courses.id)
stream(id,streamname)
degree(id,degreename,stream.id)
courses(id,coursename,degree.id)
或＃3第三
colleges(id,name)
col_course_relation(colleges.id,courses.id,stream.id,degree.id)
stream(id,streamname)
degree(id,degreename)
courses(id,coursename)
但无论何时在UI中映射这些内容，都会根据程度自动选择流。
从性能和易于编写查询的角度来看，架构更好。将有大约5万所大学* 10门课程，所以我在思考和思考的原因问这个问题。
答案 0 :(得分：1)
请正常化。