Draw the ER diagram for representing the information requirement of an university database:
There are several colleges in the university. Each college has a name, location, and strength. A college offers many courses over two terms- Spring and Autumn- during which one or more of these courses are offered. Courseid, name, and credit hours describe a course. No two courses in any college have the same courseid; likewise no two courses have the same name. Terms are identified by year and contain enrollment numbers. Courses are offered during every term. The college also has several instructors. Instructors teach; that is why they are called instructors. Often, not all instructors are scheduled to teach during all terms; but every term has some instructors teaching. Also, the same course is never taught by more than one instructor in a specific term. Further, instructors are capable of teaching a variety of courses offered by the college. Instructors have a unique employee ID and their name, qualification, and experience are also recorded.
摘要
描述ER Diagram MMORPG.svg
Čeština: Ukázkový ER diagram.
English: ER Model. A sample Entity-relationship diagram using Chen's notation. A sample Entity-relationship diagram. A sample ER diagram.
한국어: ER 다이어그램 예제.
Русский: Простая ER-модель MMORPG с использованием нотации Питера Чена.
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