Modern DBMS provide ample opportunities of developing various information systems. DB objects are represented by tables for data storage, stored procedures for data processing and various calculations, triggers and diagrams for description of the relations between tables. Trigger is a stored procedure of special type, that is automatically executed in response to certain events on a particular table in a database.
Implementation of event-threading algorithm is possible in DBMS that supports triggers, event-threading model and table creation in trigger body.
