What are the ACID properties in databases, and how can they be fully implemented?

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Accepted Answer

ACID properties ensure reliable transactions in databases: Atomicity, Consistency, Isolation, Durability.

Atomicity: Ensures all parts of a transaction are completed; if one fails, the entire transaction fails (e.g., transferring money between accounts).
Consistency: Guarantees that a transaction brings the database from one valid state to another, maintaining all rules (e.g., no negative account balances).
Isolation: Ensures that transactions occur independently without interference (e.g., two users withdrawing from the same account simultaneously).
Durability: Guarantees that once a transaction is committed, it remains so, even in the event of a system failure (e.g., saved data after a crash).

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