Folder form is adjustable form layout where you can change the postion,promt and number of feilds displayed and the default query with which the form has to be opened
If you are talking about FORMS trigger (event) then NO. You should not keep your logic in the trigger, rather you should right the code in a routine and to be executed based on the trigger event checks.
Item handlers are procedures that contain all the logic used forvalidating a particular item. An item handler package contains all theprocedures for validating the items in a block or form.
An event handler is a PL/SQL procedure that encapsulate all the code that act upon an event.Usually we will use to satisfy the requirement of Oracle forms or oralce application interface standard for form base product.
Here are the form triggers that must not be changed CLOSE_THIS_WINDOW, CLOSE_WINDOW, EXPORT, FOLDER_ACTION, KEY?COMMIT, KEY?EDIT, KEY?EXIT, KEY?HELP,LASTRECORD, MENU_TO_APPCORE, STANDARD_ATTACHMENTS, WHEN?WINDOW?CLOSED, WHEN?FORM?NAVIGATE, ZOOM .
Export function is disable when you intial open to the responisibility .that automatically enable when you enter into specific form and you need to export that data.Example :-Login as a Application De...
This is because base tables have huge amount of data and because of which if we work directly on the base tables, it will hit the performance. Also, views are simplified versions of the base tables which are easy to understand and hence to work upon.
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