Database
What is ACID?
Atomicity, Consistency, Isolation, Durability — properties guaranteeing reliable database transactions.
Definition
ACID is a set of properties that guarantee database transactions are processed reliably. Atomicity: transactions are all-or-nothing. Consistency: transactions move the database from one valid state to another. Isolation: concurrent transactions don't interfere with each other. Durability: committed transactions survive system failures. ACID compliance is a key feature of relational databases like PostgreSQL and MySQL.