4D 21 introduces a new way to handle database operations using ORDA events. This approach replaces traditional triggers and offers better control over data operations. ORDA events run automatically when data is created, modified, saved, or deleted, allowing developers to add validation, error handling, and business logic directly in their code.

Unlike old triggers that lock entire tables, ORDA events work on individual records and can run in parallel, improving performance in multi-user environments. This document explains how to use ORDA events effectively and provides guidance for migrating from classic 4D triggers to this modern approach.

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