Database Polling
Database polling is a technique where an application periodically queries a database to check for new or updated data, typically using scheduled intervals or timestamps. It is commonly used to detect changes in data when real-time notifications or event-driven architectures are not available or practical. This approach involves repeatedly executing queries to monitor specific tables or fields for modifications.
Developers should use database polling in scenarios where systems lack built-in change data capture (CDC) mechanisms or when integrating with legacy databases that do not support triggers or event listeners. It is suitable for batch processing, data synchronization between systems, or implementing simple notification systems where low latency is acceptable, such as in cron jobs or background tasks that update dashboards or caches.