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Database Systems 621: Key Concepts

Information Technology10 CardsCreated 18 days ago

This deck covers essential concepts from Chapter 1 of the Database Systems 621 module, including data vs. information, database architecture, user types, and data integrity.

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What is the difference between data and information?

Data is a collection of values, while information is processed, organized, and structured data presented in a context that humans can understand.

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Key Terms

Term
Definition
What is the difference between data and information?
Data is a collection of values, while information is processed, organized, and structured data presented in a context that humans can understand.
What is a database system?
A database system is a computer-based system used to record and maintain information significant to an organization.
What are the two main components of a database?
The two main components are the schema, which defines the structure of data, and the data itself, which are the facts stored in the database.
Who are application programmers in the context of databases?
Application programmers are developers who interact with the database using DML queries within application programs like C, C++, and Java.
Describe the 3-tier architecture in database systems.
The 3-tier architecture consists of the presentation layer (user interface), application layer (business logic), and database server (data storage).
What is data abstraction in database systems?
Data abstraction is the process of hiding irrelevant details from users to simplify interaction with the database.

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Database Systems 621: Key Concepts
TermDefinition
What is the difference between data and information?
Data is a collection of values, while information is processed, organized, and structured data presented in a context that humans can understand.
What is a database system?
A database system is a computer-based system used to record and maintain information significant to an organization.
What are the two main components of a database?
The two main components are the schema, which defines the structure of data, and the data itself, which are the facts stored in the database.
Who are application programmers in the context of databases?
Application programmers are developers who interact with the database using DML queries within application programs like C, C++, and Java.
Describe the 3-tier architecture in database systems.
The 3-tier architecture consists of the presentation layer (user interface), application layer (business logic), and database server (data storage).
What is data abstraction in database systems?
Data abstraction is the process of hiding irrelevant details from users to simplify interaction with the database.
What is the role of a database administrator (DBA)?
A DBA is responsible for the overall control of the database system, including installation, configuration, design, performance monitoring, and security.
What is data redundancy, and why is it a problem?
Data redundancy refers to the repetition of data in a database, which complicates maintenance and can lead to inconsistencies.
What is data integrity?
Data integrity ensures that data is reliable and accurate, preventing incorrect data types from being inserted into database records.
What is the purpose of normalization in databases?
Normalization is a process used to reduce data redundancy and improve data integrity by organizing database tables.