Copy Code Trigger Definition 

                
                    create trigger dbo.TR_SCHEDULINGEXCEPTION_ENSUREONEROW_DELETE
                        on dbo.SCHEDULINGEXCEPTION
                        after delete
                    as
                    begin
                        set nocount on
                        
                        if (select count(*) from dbo.SCHEDULINGEXCEPTION) < 1
                        begin
                            exec dbo.USP_RAISE_ERROR
                            rollback transaction
                        end
                    end