Grokking Database Fundamentals for Tech Interviews
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Consistency
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What is Consistency?

Consistency, one of the ACID properties, ensures that a database adheres to all predefined rules and constraints at all times. A transaction must transition the database from one valid state to another while maintaining all data integrity constraints.

Key Points:

  • A transaction cannot violate database rules, such as unique keys, foreign key constraints, or business rules.
  • If a transaction fails, the database state must remain unchanged, preserving its integrity.

The database always follows rules, ensuring valid data before and after transactions.

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Table of Contents

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