INF2603 Databases I

University of South Africa

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INF2603 - Databases I systems.
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32

april 2022

2021/2022
INF2603 - Databases I systems. Chapter 1: Database Systems Data: Raw facts Information: The result of processing raw data to reveal its meaning. Knowledge: The body of information and facts about a specific subject. Data Management: A discipline that focuses on the proper generation, storage and retrieval of data. Database: A shared, integrated computer structure that stores a collection of: • End-user data or raw facts of interest to the end user. • Metadata or data about data, thro...
DoctorReinhad
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INF2603 STUDY NOTES SUMMARY.
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32

november 2021

2021/2022

A+
INF2603 STUDY NOTES SUMMARY. Chapter 1: Database Systems Data: Raw facts Information: The result of processing raw data to reveal its meaning. Knowledge: The body of information and facts about a specific subject. Data Management: A discipline that focuses on the proper generation, storage and retrieval of data. Database: A shared, integrated computer structure that stores a collection of: • End-user data or raw facts of interest to the end user. • Metadata or data about data, through...
ExcelAcademia2026
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inf2603-202-2021-marking-rubric.
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17

november 2021

2021/2022

A+
Welcome to the INF2603 exam. The paper consists of 4 pages. Instructions: • Please answer the questions in the order in which they have been set. • You signed an Honesty Declaration. This means you will complete this paper on your own and without help. Additional student instructions 1. Students must upload their answer scripts in a single PDF file (answer scripts must not be password protected or uploaded as “read only” files) 2. Incorrect file format and uncollated answer script...
ExellentStudyResources
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INF2603 Exam prep.
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26

november 2021

2021/2022

A+
Chapter 8 Advanced SQL NOTE Several points are worth emphasizing:  We have provided the SQL scripts for the chapters. These scripts are intended to facilitate the flow of the material presented to the class. However, given the comments made by our students, the scripts should not replace the manual typing of the SQL commands by students. Some students learn SQL better when they have a chance to type their own commands and get the feedback provided by their errors. We recommend that th...
ExellentStudyResources
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Samenvatting

INF2603 Summary.
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15

november 2021

2021/2022
Data Models: - designer + programmer + end user - representation of data structure Properties of a relation: - table is 2D w/ rows and columns - row = tuple - row represents single entity occurrence w/in entity - column represents attribute w/ unique name - intersection of row and column represents single data value - values in column must have same format - column's specific range of values = attribute domain - order is immaterial - each table must have attribute or collection of a...
ExellentStudyResources
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INF2603 answers-to-review-questions.
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42

november 2021

2021/2022

A+
Answers to Review Questions 1. Name and discuss the different levels of data abstraction as defined by ANSI/SPARC. Conceptual Located at the abstraction apex, the conceptual model represents a global view of the data. It forms the basis of the conceptual schema, which provides a relatively easily understood bird's-eye view of the data environment. Since the conceptual model focuses on the main data objects and avoids detail, it exhibits both software and hardware independence. The most ...
ExellentStudyResources
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INF2603 ASSIGNMENT 2 SEMESTER 2.
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12

oktober 2021

2021/2022

A+
INF2603 ASSIGNMENT 2 SEMESTER 2. INF2603 - Databases I. What is a subtype discriminator? Given an example of its use. (3) A subtype discriminator is the attribute in the supertype entity that is used to determine to which entity subtype the supertype occurrence is related. For any given supertype occurrence, the value of the subtype discriminator will determine which subtype the supertype occurrence is related to. For example, an EMPLOYEE supertype may include the EMP_TYPE value "P" to ind...
ExcelAcademia2026
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