Trigger inserting updating deleting


16-Feb-2020 08:00

trigger inserting updating deleting-60

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A constraint can apply either to new data only (like a trigger) or to both new and existing data.Constraint behavior depends on constraint state, as explained in .Example 9-1 Trigger Uses Conditional Predicates to Detect Triggering Statement This example creates a DML trigger that uses conditional predicates to determine which of its four possible triggering statements fired it.-- Create type of nested table element: CREATE OR REPLACE TYPE nte AUTHID DEFINER IS OBJECT ( emp_id NUMBER(6), lastname VARCHAR2(25), job VARCHAR2(10), sal NUMBER(8,2) ); / -- Created type of nested table: CREATE OR REPLACE TYPE emp_list_ IS TABLE OF nte; / -- Create view: CREATE OR REPLACE VIEW FOR EACH ROW BEGIN -- Insert on nested table translates to insert on base table: INSERT INTO employees ( employee_id, last_name, email, hire_date, job_id, salary, department_id ) VALUES ( : Employee.emp_id, -- employee_id : Employee.lastname, -- last_name : Employee.lastname

A compound DML trigger created on a noneditioning view is not really compound, because it has only one timing point section.Some of these are the native C API wrapper while the other implement the standardized Java Database Connectivity (JDBC) API.In this section, we will introduce you to a modern JDBC driver which is called SQLite JDBC package.A compound DML trigger created on a table or editioning view can fire at multiple timing points.