What tasks are supported by transactions in a database management system?

Transactions in a DBMS ensure that a set of operations is executed as a single unit, guaranteeing the following properties (ACID):

• Atomicity: all operations of a transaction are either fully completed or not executed at all.
• Consistency: after a transaction completes, the database remains in a correct state.
• Isolation: concurrent transactions do not affect each other as if they were executed sequentially.
• Durability: after a transaction is committed, changes are saved even in case of failures.

This allows reliable management of data changes, prevents partial updates, and ensures data integrity during concurrent access.