I would like to create a trigger that fires on update or delete of column data. I then would like to spool to another table which column was updated, the old value and the new value. How might I go about doing this?
The trick to this one is to use the "new" and "old" values of the column that is being deleted. I'll show you an example of how you do this.
CREATE TRIGGER my_table_trigger BEFORE update OR delete ON my_table FOR EACH ROW DECLARE today DATE; BEGIN -- Get today's date and time SELECT sysdate INTO today FROM dual; -- Insert new and old values into other table INSERT INTO other_table VALUES(today,:new.col1,:old.col1,:new.col2,:old.col2); END; /
Hopefully, you can see how I used the ':new' or the ':old' clause on the column name to specify the new value for the column and the old value for the column.
Dig Deeper on Oracle database design and architecture
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.