The document describes an entity relationship (ER) diagram for a university database. The ER diagram models entities such as students, departments, courses, and sections. It also models attributes of these entities and relationships between entities such as students having a major department, courses being offered by departments, and students receiving grades in sections.

1. The (min,max) notation Employee Department Manages (1,1) (0,1) Employee Department Works-for (1,N) (1,1)

3. ER DIAGRAM – Entity Types are: EMPLOYEE, DEPARTMENT, PROJECT, DEPENDENT

4. COMPANY ER Schema Diagram using (min, max) notation

6. University ER Diagram Student Class StudentID SSN Sex Zip Degree City Birth date State Name Address Section Instructor Year Semester SectionNumber GPA Numeric Grade Letter Grade Grade_Report Belong_To Offer Minor In Major In Department DName DCode OfficeNumber OfficePhone College Course CName CourseDesc CNumber Credits

7. ER DIAGRAM FOR A BANK DATABASE © The Benjamin/Cummings Publishing Company, Inc. 1994, Elmasri/Navathe, Fundamentals of Database Systems, Second Edition

8. FIGURE 3.17 An ER diagram for an AIRLINE database schema.