update sc
                            set [cnt] = cb.cnt,
                                [date] = cb.[date]
                            from subscriber_counters_buffer cb
                                inner join subscriber_counters sc on sc.subscriber_id = cb.subscriber_id
                                                                 and sc.period_type_id = cb.period_type_id
                                                                 and sc.channel = cb.Channel
                                                                 and sc.counter_type = cb.counter_type

                        if(@@ROWCOUNT != (select count(*) from subscriber_counters_buffer))
                        begin
                            insert into subscriber_counters
                                select cb.subscriber_id, cb.period_type_id, cb.channel, cb.[cnt], cb.[date], cb.counter_type
                                    from subscriber_counters_buffer cb
                                    where not exists
                                    ( select 1
                                        from subscriber_counters sc
                                        where sc.subscriber_id = cb.subscriber_id
                                          and sc.period_type_id = cb.period_type_id
                                          and sc.channel = cb.Channel
                                          and sc.counter_type = cb.counter_type
                                    )
                        end