RDB Schema Terminology

1. Introduction

Relational Database Schema Terminology is essential for understanding how data is organized, managed, and accessed within relational databases. This lesson provides a detailed overview of key concepts and terms used in RDB schemas.

2. Key Concepts

• **Schema**: The logical structure that defines the organization of data in a database.
• **Table**: A collection of related data entries consisting of rows and columns.
• **Row**: A single record in a table, representing an instance of an entity.
• **Column**: A set of data values of a particular type, representing an attribute of the entity.
• **Primary Key**: A unique identifier for each row in a table.
• **Foreign Key**: A field in one table that uniquely identifies a row of another table.

3. Common Terms

4. Best Practices

• Ensure that primary keys are unique and not null.
• Use foreign keys to maintain referential integrity between tables.
• Normalize your database to reduce redundancy and improve data integrity.
• Document your schema for better understanding and maintenance.

5. FAQ

6. Flowchart

            graph TD;
                A[Start] --> B{Is schema defined?}
                B -- Yes --> C[Proceed to create tables]
                B -- No --> D[Define schema]
                D --> C
                C --> E[Add primary keys]
                E --> F[Establish relationships]
                F --> G[Normalization]
                G --> H[End]