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Draw an E-R Diagram showing each entity, its attributes, and it relationships to the other entities.
State any assumptions you make.
Also Describe your usage of the mailing list, including the dates and subjects of the postings.
Bob's Bookworld is a wholesale supplier of textbooks to college bookstores. The company would like to develop a database to track customers orders. Textbooks are uniquely identified by an ISBN printed on their back cover and are also characterized by title, author name(s), subject and price. College bookstores are each assigned a unique Customer ID and are also characterized by their store name, address, and phone number. Each store is uniquely identified by an order number and also records the date the order was placed, subtotal, sales tax amount and order total. Orders can include multiple copies of a single textbook and/or different textbooks. For each textbook ordered, the quantity ordered should be recorded.
Consider a video game store. For each game, the database contains information about title, producing company name, designer(s) name(s), version of the game, type of the game and characters in the game.
1. explain the concept of physical data independence and its importance in database systems2. explain what problems are
Suppose you want to generate a report listing each customer name and the amount due from each customer. Which tables contain the data you need to generate the report?
Create the relational model corresponding to the described application. Basically, list the CREATE TABLE statements with the attribute names, and appropriate data types.
What does the exec above produce in terms of results. If you wanted companies that had 'Corp' in their name how would you code the EXEC statement - What does the exec above produce in terms of results. What would happen it you miss coded the maxim..
Assume you are making a database to help university keep track of its course offerings. You might have following entities in database, as they are distinct items in real life.
Data Modeling and Normalization
Let us assume that a program takes 400 seconds of elapsed time to execute. Out of these 400 seconds, 320 seconds is the CPU time and the rest is I/O time. What percentage of elapsed time is spent on I/O operations?
Make a 3-by-3 chart with row and column labels WHITE, GRAY, and BLACK. In each cell (i, j), indicate whether, at any point during a depth-first search of directed graph.
Write a two-page executive summary for your boss explaining how a relational data solution can be applied to a current business problem or area for improvement. Assume that your boss knows nothing about relational database theory.
Create a data warehouse for electronics store chain. The chain has 20 stores in 5 cities. Each store has different sections including computers, DVDs, TVs, audio, home appliances etc.
Identify the entities and relationships that are relevant for a system to manage SEAMM. Develop a data dictionary (catalogue) and create an E-R diagram.
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