What is a Primary Key? IGCSE ICT

Databases are crucial for organizing and managing data in IGCSE ICT. One key concept is the primary key. Let's explore its significance and how it ensures efficient databases. For expert guidance in IGCSE ICT, visit www.igcseict.online.

What is a Primary Key?

A primary key is a unique identifier in a table that helps locate specific records. It ensures data integrity and efficient retrieval.

Importance of a Primary Key:

1. Uniqueness and Data Integrity:

Prevents duplicate entries, maintaining data accuracy and reliability.

2. Efficient Data Retrieval:

Enables quick record location, even in large tables. Improves database performance.

3. Relationship Establishment:

Helps link and organize data across multiple tables, enhancing data management.

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