Home Pricing Archive About Privacy

Structure of Relational Databases

📑 5 slides 👁 34 views 📅 3/12/2026 📄 PDF
0.0 (0 ratings)

Introduction to Relational Databases

A relational database stores data in tables with rows and columns

Introduction to Relational Databases
2

Key Components: Relations & Attributes

  • Relations are two-dimensional tables with attributes (columns) and tuples (rows)
  • Attributes represent entity properties and have unique names within a relation
  • Each attribute has a defined domain that restricts possible values
Key Components: Relations & Attributes
3

Tuples and Database Schema

  • Tuples are ordered sets representing single records in a table
  • Relation schema defines structure: Relation_Name(Attribute1, Attribute2...)
  • Relation instance contains current data that changes with operations
Tuples and Database Schema
4

Database Keys and Constraints

  • Primary keys uniquely identify tuples and cannot be NULL
  • Foreign keys reference primary keys to maintain relationships
  • Integrity constraints ensure data validity and relationships
Database Keys and Constraints
5

Summary of Key Concepts

  • Relational databases organize data in structured tables with relationships
  • Proper schema design and constraints maintain data integrity
  • Keys enable efficient data retrieval and relationship management
Summary of Key Concepts
1 / 5