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Part 1 - Using the data items given below, construct an REA diagram (entities, participation cardinalities, relationships). The conceptual model could use the model form we have used in classEvents in middle, Resources on left and Agents on right. Bring a printed version of REA Diagram to class. If you use a computer with Visio, you can change the REA diagram below.
Part 2: Design a minimal relational database for Pieces Boutique. By minimal, it is meant that option to post a key into existing table because of either needed participation or a discernible high load could be exercised where appropriate. Use the subsequent format for the DB design: Table Name Primary Keys Attributes Foreign Keys Make sure you have good reasons for putting model elements in for keeping model components out. Please do not add attributes to this list. Some data items on this list can be used more than once in building the REA model and relational database and some attributes can't be used at all if they are volatile attributes
Explain each of three database models, hierarchical, relational, and object-oriented, and provide specific referenced example of each of these model types implemented in a functioning database
Draw an Entity Relationship diagram for the system and Identify the table design for the database displaying all the fields/attributes. Ensure that all tables are in 3NF. You also need to identify the primary keys and foreign keys, where applicable..
Design and build a prototype data warehouse using the data on Spend over £25,000 in the Science and Technology Facilities Council
Create a database for Ray. He is interested in movies and wants to keep information on movies, actors, and directors in a database. The only user is Ray, and he needs to produce reports.
Explain the differences between the storing data in Access and Excel. Why you would use a spreadsheet over the database?
One of the tenets of database development is to never permit developers to create or own objects during development. All objects are created by application owner and stored in that schema.
Using Internet as the research tool for extra information not presented in text, describe why application roles are important part of the security model for databases.
Use SQL to create the following database; to including referential integrity. You may NOT use the GUI for this part of the exercise. COURSE ( CourseNu, CourseName, CreditHrs).
List the students ID, name, GPA, and course Number such that all students have GPA greater than 3 . 5 and enrolled in a course in Jan 1, 2011. Find the names of all students who have GPA greater than 3.
Create a report which identifies five most expensive bicycles. The report must list bicycles in descending order from most expensive to lease expensive, the quantity on hand for each, and the markup percentage for each.
Estimate the height of the B+ tree. (Giving a range of heights is fine.) Also estimate the amount of memory needed to store the tree, including leaves but not including the posting lists themselves.
Compare the two non-sequential file structure models. What advantages does the first one have over the second and what advantages does the second have over the first?
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