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Concepts and principles
(Each answer should contain approximately 300 words.)
Question 1
What decision need to be made during physical design, and when should be create clustered indexes?
Question 2
Describe the main idea behind discretionary access control. What are its weakness?
Question 3
Explain fragmentation and replication, and explain their differences in data distribution and updating.
Question 4
Define association rules, and explain how to induct association rules by using frequent itemsets, a Priori Property, and support and confidence measures.
Illustrate all data in each of the four tables. Don't show foreign key columns. Write down the names and e-mail addresses for all customers who have had stove repair which cost more than $50.
What is meant by data independence? Explain your answer and identify two benefits of separating application software from the database management system.
Design and implement an application that reads an integer value representing a birthdate from the user. First get the month, then get the day and then finally the year from the user.
Develop a view named OrdTot. It comprises the order number and order total for each order presently on file. (Order total is sum of the number ordered multiplied by quoted price.
Write a script that calculates the common factors between 10 and 20. To find a common factor, you can use the modulo operator (%) to check whether a number can be evenly divided into both numbers.
Construct a query that can be used on a report for determining how many days the customer's invoice will require payment if total amount due is within 45 days. Provide a copy of your working code as part of the paper.
Your job is to create a database management system for bike shop who ‘buys' and ‘sells' new and second-hand bikes, and also parts of bike. Bike is constructed with parts while part can be fitted to different bikes.
Show the REA diagram using Microsoft Word
How many entities are shown by this relation?
Your task is to develop a database to support this activity.Here is what you need to be able to provide Custom Auto Body in order to land your first consulting contract:
Evaluate the success WellCo and PharmaCARE shareholders
Provide expression in relational algebra for each of the following queries: Give all the managers in database a 10 percent salary raise. Give all the other employees a 5 percent salary raise.
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