ACID PROPERTIES IN DBMS
BY
JYOTIRMOTY BERA
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What are ACID Properties?

For maintaining the integrity of data, the DBMS system you have to ensure
ACID properties. ACID stands for Atomicity, Consistency, Isolation,
and Durability.
Atomicity:
A transaction is a single unit of operation. You either execute it entirely or do
not execute it at all. There cannot be partial execution.
Consistency:-

Once the transaction is executed, it should move from one consistent state to
another.
Isolation:
It shows that the data which is used at the time of execution of a transaction
cannot be used by the second transaction until the first one is completed.

A transaction in process and not yet committed must remain isolated from any
other transaction.
Durability:-

Committed data is saved by the system such that, even in the event of a
failure and system restart, the data is available in its correct state.
When is ACID Needed?

The ACID properties are designed as principles of transaction-oriented
database recovery.

If a transaction like this fails halfway through, it could have major
consequences. Money could be debited from the first account but not
credited to the other account.
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