Explain the acid properties of a transactionans acid, Ask an Expert

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Explain the ACID properties of a transaction

Ans: ACID properties are a significant concept for databases. The ACID stands for Atomicity, Consistency, Isolation, and Durability.

Atomicity: Atomicity means either all operations of transaction are reflected properly in the database or none are.

Consistency: Consistency means execution of a transaction in isolation (that is with no other transaction executing concurrently) preserves the consistency of the database

Isolation: Although multiple transactions may execute concurrently the system assures that for each pair of transaction T_i and T_j, it appears to T_i that either T_j that either T_j finished execution previous to T_istarted or T_jstarted execution after Ti finished. So each transaction is unaware of other transactions executing simultaneously in the system.

Durability: later than a transaction completes successfully, the changes it has made to the database persist, even if there are system failures.

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