Query: lambda_function_dead_letter_config_status

select
  dead_letter_config_status,
  count(*)
from
  (
    select
      case
        when dead_letter_config_target_arn is not null then 'configured'
        else 'not configured'
      end dead_letter_config_status
    from
      aws_lambda_function
  ) as t
group by
  dead_letter_config_status
order by
  dead_letter_config_status desc;