ATAbase> 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)