His books, which often form the basis of his presentations, have been translated into many languages besides English, including Chinese, Dutch, French, German, Greek, Italian, Japanese, Korean, Polish, Russian, and Spanish.Allen is the president of Sharon Parq Associates, a computer and publishing services company located in Orem, Utah.Like a stored procedure, a trigger is a named PL/SQL unit that is stored in the database and can be invoked repeatedly.Unlike a stored procedure, you can enable and disable a trigger, but you cannot explicitly invoke it.Through the written word, Allen has helped millions of readers learn how to better use computers.Besides writing books, Allen has helped educate thousands of individuals through seminars and lectures throughout the United States, as well as throughout Mexico and Costa Rica.
For example, you cannot have two compound statement construct. Some statements are not permitted in triggers; see Section C.1, “Restrictions on Stored Programs”. A boolean value specifies whether to show filter row or not. A boolean value specifies whether to show grid header or not.A boolean value specifies whether data is displayed by pages.A boolean value specifies whether to load data by page. A boolean value specifying whether to ask user to confirm item deletion.