試題詳解

41. 在 SQL 中，如何定義一個觸發器？
(A) CREATE TRIGGER trigger_name ON table_name BEFORE INSERT AS BEGIN ... END；
(B) CREATE TRIGGER trigger_name ON table_name FOR EACH ROW BEGIN ... END；
(C) CREATE TRIGGER trigger_name ON table_name AFTER INSERT AS BEGIN ... END；
(D) CREATE TRIGGER trigger_name ON table_name FOR EACH STATEMENT BEGIN ... END；。