Transactions in Database Systems

In database systems, a transaction is a grouped set of actions performed on the data that are treated as a single unit. It ensures that either all actions are completed successfully or none are applied, maintaining data integrity. Think of it like a banking transfer: money is deducted from one account and added to another—both steps must happen together; if one fails, both are reversed. Transactions follow key principles called ACID properties—Atomicity, Consistency, Isolation, and Durability—to guarantee reliable and accurate data management despite errors or concurrent operations.