SELECT document_type_code FROM documents GROUP BY document_type_code HAVING count(*)  >  2
Give the codes of document types that have more than 2 corresponding documents.
SELECT document_type_code FROM documents GROUP BY document_type_code HAVING count ( * ) > 2
select document_type_code from documents group by document_type_code having count ( * ) > value
Give the codes of document types that have more than 2 corresponding documents .