If I have two tables called person and tax with their columns (id "of type int", name "of type varchar", tax "of type int") and (id "of type int", percentage "of type varchar ", available" of type boolean ") respectively, being the column person.impuesto is a foreign key. How can I create a trigger for the person table that runs in the INSERT and verify that if person.an.available is equal to true then the INSERT statement is executed correctly, but if person.an.available.is equal to false, the INSERT ruling is canceled