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Questions and Answers
What is the primary purpose of a file system?
Which of the following is NOT one of Codd's 12 rules for RDBMS?
What is the primary function of a control file in a database storage structure?
What is the primary difference between structured and unstructured data?
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What is the primary function of DDL commands in SQL?
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Study Notes
Database Concepts
- A file system is a method for storing, organizing, and retrieving files on a computer, but it has limitations when it comes to managing large amounts of data.
- A Database Management System (DBMS) is a software system that allows for the definition, creation, maintenance, and manipulation of databases.
- The need for a DBMS arises from the need to manage large amounts of data efficiently and effectively.
- E.F. Codd's 12 rules for Relational Database Management Systems (RDBMS) define the basic principles of a relational database.
Database Storage Structure
- A table space is a storage area that holds the actual data and related information in a database.
- A control file is a binary file that contains metadata about the database, such as the database name, creation date, and storage parameters.
- A data file is a physical file that stores the actual data in a database.
Data Collection and Types
- Data collection is the process of gathering and measuring data from various sources to gain insights and make informed decisions.
- Data can be categorized into two types: structured and unstructured data.
- Structured data is organized and formatted in a specific way, making it easily searchable and machine-readable.
- Unstructured data lacks a predefined format, making it difficult for machines to read and analyze.
Introduction to SQL
- SQL (Structured Query Language) is a standard language for managing relational databases.
- DDL (Data Definition Language) commands are used to define the structure of a database, including creating, modifying, and deleting database objects.
- DML (Data Manipulation Language) commands are used to manipulate data in a database, including inserting, updating, and deleting data.
- DCL (Data Control Language) commands are used to control access to a database, including granting and revoking permissions.
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Description
This quiz covers database concepts, storage structures, and SQL commands. Test your knowledge of file systems, DBMS, and data collection, as well as DDL, DML, and DCL commands.
