with data as (
select
	id,
count(fields->'001') as count_of_001_fields
from (
  select *,
  jsonb_array_elements((marc_records_lb.content #>> '{}')::jsonb -> 'fields') as fields	
  from diku_mod_source_record_storage.marc_records_lb
) sub
group by  id having COUNT(fields->'001') > 1
) 

select * from data order by count_of_001_fields desc