The software used to store, manage, query, and retrieve data stored in a relational database management system (RDBMS). Provide a detailed explanation of any five functions of an RDBMS. 20 Marks
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Step 1
It ensures that the data is organized and easily accessible. Step 2: Data Management RDBMS manages the data by enforcing data integrity constraints, such as unique keys, foreign keys, and check constraints. It also handles transactions to ensure that data remains Show more…
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Explain RDBMS and how it works in brief in 5 marks. RDBMS stands for Relational Database Management System. It is a software system that manages relational databases. A relational database is a collection of data organized into tables, where each table consists of rows and columns. RDBMS allows users to create, update, and retrieve data from these tables. The main components of an RDBMS are: 1. Tables: These are the main storage units in an RDBMS. Each table represents a specific entity or concept and consists of rows and columns. Rows are also known as records, and columns are also known as fields. Tables are related to each other through keys. 2. Keys: Keys are used to establish relationships between tables. They are unique identifiers for each record in a table. The primary key is a unique identifier for the entire table, while foreign keys are used to establish relationships between tables. 3. Queries: Queries are used to retrieve data from the database. They allow users to specify the criteria for selecting data and the desired output format. SQL (Structured Query Language) is commonly used to write queries for RDBMS. 4. Integrity Constraints: These are rules that ensure the data in the database remains consistent and accurate. Examples of integrity constraints include primary key constraints, foreign key constraints, and check constraints. 5. Transactions: Transactions are units of work performed on the database. They ensure that multiple operations on the database are executed as a single, atomic operation. Transactions follow the ACID (Atomicity, Consistency, Isolation, Durability) properties to maintain data integrity. In summary, RDBMS is a software system that manages relational databases. It uses tables, keys, queries, integrity constraints, and transactions to organize and manipulate data.
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