Our assignment will be about a student attendance. Entities: student, course, instructor, attendance, enrollment, department, class. Relationships: Student is enrolled in course, Course has instructor, Department has many courses, Detail of the scenario Developing ERD Defining at least 7 Entity Defining attributes Defining all necessary relationships (Identify with matrix diagram) If possible superype-subtype, arc and hierarchical structures, non-transferable relationship. Preparing "table instance chart" to map ERD to DB structure Writing SQL DDL statements for implementing ERD (create table, constraints, defining keys: pks and fks) Making Physical Database using APEX Entering data to the Database Writing SQL DML Statements to reach information One statement including subquery One statement including join One statement including group by One statement including date function "One statement including character function One statement including update One statement including alter table

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Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.