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Definition

Database Schema

A blueprint that outlines how data is organised within a database.

To be more specific, a database schema defines the structure of the database including:
1. Tables
2. Fields
3. Relationships
4. Constraints

Note

The schema acts as a logical framework that guides how data is stored, accessed, and managed.

Types of Schema

Conceptual Schema

Purpose: Shows entities and which are linked.

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Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Note

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Tip

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Introduction to Database Schema

A database schema is a fundamental concept in database design that serves as a blueprint for how data is organized and structured within a database system. It provides a clear and organized way to define the structure of a database, including its tables, fields, relationships, and constraints.

Think of a database schema as the architectural plan for a building, where every detail of the structure is carefully planned and documented before construction begins.
Just as an architect's blueprint guides the construction of a building, a database schema guides the creation and maintenance of a database.

DefinitionDatabase SchemaA formal definition of the structure of a database, including its tables, fields, relationships, and constraints.

AnalogyImagine a database schema as a detailed map of a city, where each building represents a table, streets represent relationships, and zoning laws represent constraints.

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

A.2.2 The Term Schema Notes