Read Committed
Read Committed is an isolation level in database transaction management that ensures a transaction only reads data that has been committed by other transactions, preventing dirty reads. It is one of the standard isolation levels defined in the SQL standard (ANSI/ISO) and widely implemented in relational databases like PostgreSQL, MySQL, and SQL Server. This level provides a balance between data consistency and concurrency by allowing non-repeatable reads and phantom reads but blocking uncommitted data access.
Developers should use Read Committed when building applications that require moderate data consistency without the performance overhead of higher isolation levels like Serializable. It is suitable for scenarios such as e-commerce platforms, content management systems, or financial applications where concurrent transactions are common but dirty reads must be avoided to prevent data corruption. This level helps maintain application integrity while allowing better throughput compared to stricter isolation levels.