trigger

database An action causing the automatic invocation of a

procedure, for instance to preserve referential integrity.

A triggers goes into effect when a user attempts to modify

data with an insert, delete, or update command. A trigger can

instruct the system to take any number of actions when a

specified change is attempted. By preventing incorrect,

unauthorized, or inconsistent changes to data, triggers help

maintain the integrity of the database.

[Sybase SQL Server Release 10.0 Transact-SQL User's Guide].

(1995-02-22)