Views

Select triggers execute a triggered action for views whose base tables contain a reference to a triggering column. You cannot, however, define a Select trigger on a view.

Suppose you create the following view:
CREATE VIEW view_tab AS
   SELECT * FROM tab_a;
The following statements execute a triggered action on the hits_trig trigger for each instance of a row that the view returns:
SELECT * FROM view_tab;

SELECT col_a FROM tab_a;