Which languages have the most terms with redundant head parameter

SQL

select
	language_name, count,
    lemma_count, nonlemma_count,
    round(cast(count as float) / cast(lemma_count + nonlemma_count as float), 2) as fraction
    from (
  select language_name, count(*) as count
  from (
    select substring(cl_to, 1, instr(cl_to, '_terms_with_redundant_head_parameter') - 1) as language_name
    from categorylinks
    where cl_to like '%\_terms\_with\_redundant\_head\_parameter'
  ) as category_appearances
  group by language_name
  order by count desc
) as languages
left join (
  select entry_language, count(*) as entry_count
  from (
    select
    	substring(cl_to, 1, coalesce(nullif(instr(cl_to, '_lemmas'), 0), instr(cl_to, '_non-lemma_forms')) - 1) as entry_language,
    	cl_from
    from categorylinks
    where cl_to like '%\_lemmas' or cl_to like '%\_non-lemma\_forms'
  ) as entries
  group by entry_language, cl_from
) as entries
left join (
  select lemma_language, count(*) as lemma_count
  from (
    select
    	substring(cl_to, 1, instr(cl_to, '_lemmas')- 1) as lemma_language,
    	cl_from
    from categorylinks
    where cl_to like '%\_lemmas'
  ) as lemmas
  group by lemma_language, cl_from
) as lemmas
on lemma_language = language_name;
SQL

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