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Nt1330 Unit 3 Assignment 1

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2.3 Answer:
Major difference is the frequency of they get change. Database schema changes very rare when a new object has been added or deleted or any master detail /lookup relation has been setup between objects. However, database set gets updated very frequently on update on every DML on the record of any objects in system.
1. The skeleton of the database, their association with the different objects will be defined by Database Schema. Basically, it is the overall design describing the database to give the logical view of the objects present in application and the relationship among them.
2. At a particular time, database state defines the content of the database.

2.5 Answer:
As the name suggest, physical data is independent of logical data. Anything …show more content…
However, centralized will fail as client and server are present at different machines and using web based application to interact to each other.
2.5.2 In the case, where the entire logic is written on server rather than on DBMS server, two tier architectures can also be used for this scenario. However, if the business logic has been written on either client or server, it would put extra burden on the machine.

2.15 Answer
Table Column(s)
COURSE CourseNumber
It includes two keys one for department and its unique number. Instead we could use course name and course number but it can give an error if someone types different wrong course details.

PREREQUISITE This will include the combination of PrerequisiteNumber and CourseNumber to create a record.
SECTION SectionIdentifier
A section id will always be unique and no two sections will have same id.This id can be used to get more details for a particular section that will include SectionIdentifier, CourseNumber, Semester, and Year. From the table of sections.
GRADE_REPORT StudentNumber and SectionIdentifier
These both are unique keys that will pass this id as key parameter and fetch more details for the

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