Write the short answers for the given question. Answer in 3-5 line maximum. A. Give examples of systems in which it may make sense to use traditional file processing instead of a database approach. Why? B. Why do we need mappings among schema levels? How do different schema definition languages support this architecture? C. Under what conditions can an attribute of a binary relationship type be migrated to become an attribute of one of the participating entity types?

The following Figure 2 shows an EER schema for a database that can be used to track sales at a car dealership. Map this schema into a relational data model, including all primary keys and referential integrity constraints (foreign keys). For the VEHICLE to CAR/TRUCK/SUV generalization, consider the four Step 8 options presented in the lecture notes for mapping specializations/generalizations. Show the relational schema design under each of those four options (8A, 8B, 8C, 8D). Model Vin Sid VEHICLE N Price SALE Date 1 SALESPERSON Name 1 CAR Ssn TRUCK Tonnage SUV CUSTOMER Engine_size Name No_seats Address State Figure 2: An EER diagram for a car dealership database. City Street

Clearly define the meaning of two types of relationships in the context of a UML class diagram: aggregation and generalisation, and provide examples.

Discuss the advantage and the drawback of relational and object-oriented models.

Explain the concept of unidirectional data flow and its relevance to one-way data binding.

Swing Jazz Club ERD Problem Follow the Simple Procedure for ERD diagramming to design an ERD using the following user provided information.   Remember the ERD will eventually turn into the design for a database from a top down view.  Make sure you resolve any many to many conflicts.  Label an identifier or primary key and all pertinent attributes given.   If an attribute is not readily apparent from the user information, then make one up that makes sense for the particular entity.  Therefore, all entities should end up with at least an identifier and another attribute that makes sense.  You may use any of the approaches shown by the book, though the ER-Model and Crow’s foot are the most common.  Make sure you show entities, relationships, cardinality, and optionality.  Swing Jazz Club The Swing Jazz Club teaches swing and jazz dancing and offers both private and group lessons.  Swing Jazz charges $60 dollars per hour for a private lesson and $10 dollars per hour for a group lesson.…

Do some research on the advantages and disadvantages of snow-flake and star schemas. Which one is less normalized than the other one?

San Diego Hospital Example ERD Problem Entity Relationship Diagramming is a "top down" user process.  Take the following user provided information and draw the appropriate ERD.  Follow the Simple Procedure for ERD diagramming to design an ERD using the following user provided information.    Remember the ERD will eventually turn into the design for a database from a top down view.   Make sure you resolve any many to many conflicts.   Label an identifier or primary key and all pertinent attributes given.    If an attribute is not readily apparent from the user information, then make one up that makes sense for the particular entity.   Therefore, all entities should end up with at least an identifier and another attribute that makes sense. Please use a drawing tool of some type to show the ERD diagram (Word, PowerPoint, and Visio all work well).   I want you to get in the habit of drawing these with a computer instead of by hand, as this will be important as we get to more difficult…