ACID

Atomicity, Consistency, Isolation, Durability

Set of properties of database trnasactions intended to guarantee data validity despite errors, power failures and other mishaps.

Atomicity

Each transation (having multiple statements) is treated as a single unit, which either successds completely or fails completely.

Consistency

Consistency ensures taht a transaction can only bring the database from one consistent state to another, preserving database invariants.

Isolation

Durability