What is the usage of WHEN clause in trigger? › Category: Pl/SQL › What is the usage of WHEN clause in trigger? 0 Vote Up Vote Down Editor">Editor Staff asked 2 years ago What is the usage of WHEN clause in trigger? 1 Answers 0 Vote Up Vote Down Editor">Editor Staff answered 2 years ago A WHEN clause specifies the condition that must be true for the trigger to be triggered.