ACID stands for Atomicity, Consistency, Isolation, and Durability. These are key properties that ensure reliable processing of database transactions.
Atomicity means a transaction is treated as a single unit. Either all its operations complete successfully, or none do. This prevents partial updates to the database.
Consistency ensures that a transaction brings the database from one valid state to another, following all rules like constraints and data integrity.
Isolation means transactions run independently without interfering with each other. For example, two people booking seats online won't see each other's incomplete bookings, avoiding conflicts.
Durability means once a transaction is committed, its changes are permanent even if the system crashes. This ensures data is not lost after confirmation.
Atomicity guarantees that all parts of a transaction succeed or none do, preventing partial updates.
Consistency ensures the database follows all rules and constraints after a transaction.
Isolation prevents transactions from affecting each other while running at the same time.
Durability ensures data changes are permanent even after failures.
Atomicity ensures that incomplete transactions do not affect the database.