Oracle PL/SQL – Delete Trigger example

This article shows you how to use DROP TRIGGER to delete a trigger.

-- delete  a trigger
DROP TRIGGER trigger_name;

1. Table + Trigger

1.1 Create a table and a trigger on it.

create table demo_data
id number(5) primary key,
project_name varchar2(10)
);

CREATE OR REPLACE TRIGGER trg_drop_example
BEFORE
     UPDATE OR DELETE OR INSERT
ON demo_data
  FOR EACH ROW 
BEGIN
  dbms_output.put_line('trg_drop_example Trigger called.');
END;

2. DROP TRIGGER example

2.1 Check the trigger status :

SELECT TRIGGER_NAME,STATUS FROM USER_TRIGGERS where upper(TRIGGER_NAME) = 'TRG_DROP_EXAMPLE';

2.2 Delete the trigger.

DROP TRIGGER trg_drop_example;
-- output
-- Trigger trg_drop_example dropped.

2.3 Check the status again.

SELECT TRIGGER_NAME,STATUS FROM USER_TRIGGERS where upper(TRIGGER_NAME) = 'TRG_DROP_EXAMPLE';
-- output
-- no rows selected.

References

1. Oracle – DROP TRIGGER
2. Oracle – PL/SQL Triggers
3. Check trigger status