Generate new bill every month

I am working on a payment system for a boarding house and I am having hard time to generate automatically a new bill for each boarders every month.
here are the columns for my "billing" table.
bill_no (primary key)
due_date
arrears
rent_month (month of the bill, e.g. "bill for the month of november")
rental_id (primary key of the table "rentals")
boarder_id (primary key of the table "boarder')
boarder_id is a foreign key of both the "billing" and "rentals" table
rental_id is a foreign key of "billing" table.
please help me make a trigger (i think) that would automatically create a new billing every month.

895529 wrote:
@Centinul
sorry but i am a noob. sorry i did not understand what you were trying to say. could you please explain further? sorry.What in particular did you not understand? If you are looking for examples of working with DBMS_SCHEDULER to schedule a job see here.
As far as trigger particulars you would probably be better going to http://tahiti.oracle.com, clicking on your Oracle version and pulling up the Oracle Concepts Guide. This will have a section on triggers that covers the basics.

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