Theory of Relational Database.pptx 0.84 Mb
- 2. Relational databases are a type of database management system (DBMS) that organizes and stores data in a structured manner, using tables to represent relationships between different entities. The fundamental idea is to represent relationships between different entities through tables, each of which consists of rows and columns.
- 3. Tables and Rows Tables are the foundation of relational databases, resembling grids with rows and columns. Each row, known as a record, holds a unique set of information. This tabular structure is fundamental for organizing and managing data.
- 4. Columns and Data Types Columns represent the attributes or fields in a table. They come with specific data types (like integers, strings, or dates) that define the kind of information they can store. Choosing the right data type ensures data accuracy and efficiency.
- 5. Keys in Relational Databases Keys are like the DNA of a database. The primary key uniquely identifies each record in a table, while foreign keys establish links between tables, creating relationships that are the backbone of relational databases.
- 6. Relationships in Relational Databases Relationships between tables are established using keys. Common types of relationships include one-to-one, one-to- many, and many-to-many. These relationships help maintain data integrity and consistency.
- 7. Normalization Relational databases often use normalization techniques to organize data efficiently and reduce data redundancy. This involves breaking down large tables into smaller ones and establishing relationships between them.
- 8. SQL Basics SQL is a standardized programming language used to interact with relational databases. It allows users to perform various operations such as querying data, inserting, updating, and deleting records, and defining the structure of the database.
- 9. Flexibility and Scalability Relational databases provide flexibility for complex data queries and manipulations, making them versatile for various applications. Their scalability allows databases to expand in size and manage increasing data volumes without a substantial loss of performance.
- 10. ACID Properties Relational databases support ACID (Atomicity, Consistency, Isolation, Durability) performance to ensure data validity regardless of errors, failures, or other potential mishaps.
- 11. • What Is A Relational Database Exploring The Basics Of Rdbms, Clumio • What Is A Relation Database, Google Cloud • Ben Lutkevich, ”Relational Database”,Techtarget 2021.