ClearConcept — A-Level Revision

Specification Reference

Relational databases

Standard

Plain English

Databases organizing data into tables (relations) with rows (records) and columns (fields), related through keys. Relational databases are dominant database type supporting ACID properties.

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Real World

Amazon uses relational databases to link Customers, Orders, and Products tables — a foreign key in the Orders table references the Customer's primary key, enabling Amazon to retrieve your full order history instantly.

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Exam Focus

Define each ACID property separately with a brief example; examiners award one mark per property correctly explained.

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