ACID (atomicity, consistency, isolation, durability) transactions ensure reliable and consistent database operations to maintain data integrity. ACID transactions consist of four key properties:
- Atomicity verifies that all parts of the transaction (read, write, update, delete) are completed as one unit. If one part of the transaction fails, the entire transaction is rolled back. This prevents data loss and corruption for critical systems.
- Consistency ensures that the transactions are consistent, following all validation rules, constraints, and integrity conditions. This helps to keep data accurate and avoid erroneous changes to the database.
- Isolation keeps transactions separate until they are completed. This prevents concurrent transactions from interfering with each other and avoids potential errors from data conflicts.
- Durability guarantees that once a transaction is completed, it’s written permanently into the database. This ensures that the data persists, even in the event of a system failure.
