OCC (Optimistic Concurrency Control)

Optimistic Concurrency Control (OCC) is a method used in database management to handle multiple users accessing and updating data simultaneously. Instead of locking data when a user reads it, OCC allows users to make changes freely. When a user tries to save their changes, the system checks if the data was modified by someone else in the meantime. If there’s a conflict, the user may need to redo their updates. OCC is efficient when conflicts are rare, as it minimizes waiting time and maximizes concurrent access, ensuring data consistency without unnecessary locking.