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Given the file structure shown in Figure P1.1, answer Problems 1-4.
1. How many records does the file contain? How many fields are there per record?
2. What problem would you encounter if you wanted to produce a listing by city? How would you solve this problem by altering the file structure?
3. If you wanted to produce a listing of the file contents by last name, area code, city, state, or zip code, how would you alter the file structure?
4. What data redundancies do you detect? How could those redundancies lead to anomalies?
Design an er schema for keeping track of information about votes taken in the U.S. House of Representatives during the current two year congressional session.
He wishes you to group data by insurance company number, with subtotals by company and grand totals for each numeric field.
Create use case to describe a typical sales process. Then make a sequence diagram for use case.
Find the maximum salary of all employees who are not managers. Give all the managers in the database a 10 percent salary raise. Give all the other employees a 5 percent salary raise.
There are many kinds of relationships in a design model of a database. Why is it important to classify each of these types in an ERD Model?
A database at a college is required to support the following requirements. Complete the information-level design for this set of requirements. Determine any constraints you need that are not stated in the problem.
Write down some of problems and issues related with internet databases? Consider security, performance, architecture issues.
Design a nested menus interface for a check-in and check-out hotel reservation system that can be used internationally.
Relational database is based on fact that data in one table can be tied, or related to data in another table. To do this, database utilizes various types of keys to form or define these relationships.
MCIS 630 Database Systems: - Write a recursive SQL query that outputs the names of all subparts of the part with part-id “P- 100”.
The DBA denormalized some of the data in Premiere Products database to enhance performance, and one of the resulting tables is following.
Explain how much the modulating signal power is required to generate 100 percent modulation? What is the approximate center frequency of filter required to pass the lower sideband?
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