Entity-relationship diagram
Course:- Database Management System
Reference No.:- EM13419

Assignment Help
Assignment Help >> Database Management System

Create an entity-relationship diagram and design accompanying table layout using sound relational modeling practices and concepts. The relationships between the entities and the attributes for the entities will be described. This database will provide the foundation for the follow-on project. The subsequent paragraphs provide the background and summary of the business requirements.

You are a database consultant with Ace Software, Inc. and have been assigned to prepare a database for the Mom and Pop Johnson video store in town. Mom and Pop have been keeping their records of videos and DVDs purchased from distributors and rented to customers in stacks of invoices and piles of rental forms for years. They have finally decided to automate their record keeping with a relational database.

1. Evaluate and list your entities. Then explain fully the relationships between entities via pairs of sentences that shows the two components of the total relationship in both directions between the entities. Relationships may be unary, binary, or ternary with respect to entities. You could not have any many-to-many relationships.

2. Begin the database logical design by identifying the entities, relationships between entities, and entities' attributes. Use the same entity/relationship diagram (ERD) notation as used in class for entities, attributes, and relationships. Sketch your ERD by hand or a drawing program (e.g., Visio, PPT, SQL Modeler ...) on one single 8-1/2" x 11" page (8-1/2" x 14" maximum), labeled "Mom and Pop Johnson Video Store Database E/R Diagram." Your ERD could not have any many-to-many relationships between entities.

3. Complete the logical database design and start the physical database design by preparing metadata documentation) that describes the table(s) created from each entity and thecolumn(s) created from each attribute in the ERD. Attributes could be self-describing. Particular attention will be given to the proper specification of all primary key (via "PK") and foreign key (via "FK") columns in the table layouts. These could match your ERD exactly. Begin these descriptions on a page labeled "Proposed Database Tables and Columns based on E/R Diagram." All tables must be 3rd Normal Form. Shows any and all assumptions that were made.

Put your comment

Ask Question & Get Answers from Experts
Browse some more (Database Management System) Materials
You are then to create a second normal form logical database model and explain why you made the changes from the first normal form database using the second normal form rule
Recognize level within a database system (user, programmer of application software, and designer of the DBMS software) at which each of the following concerns or activities
Advanced Database Administration (COMP 0343) Manage client-server connections using RDBMS Net Services - Evaluate requirements and select appropriate parameters to ensure effe
Write down your subquery MAX_CALC_SAL. Name columns in result JOB_TITLE and JOB_TOTAL, and sort result on JOB_TOTAL in descending order.
Suppose that a certain program takes 500 seconds of elapsed time to execute. Out of these 500 seconds, 280 seconds is the CPU time and the rest is I/O time. What will be the
Your goal is to develop a database that shall allow ECI to keep track of its business and provide the management with the following information regarding the performance of
Describe the research database or collection of research including the purpose and the subject matter it covers. Explain how the database relates to your topic of interest/qu
Modify the SavePersonnel() function so that instead of just doing a single SQL INSERT operation with all the personnel data, it does an INSERT with only the FirstName and La