section_id sort(aulas$section_id,TRUE) length(unique(aulas$section_id)) table(sort(aulas$section_id,FALSE))
section_id sort(aulas$section_id,TRUE) length(unique(aulas$section_id)) table(sort(aulas$section_id,FALSE))
hoje, com a Alura e o Google Gemini
Ariston, não entendi, seria alguma dúvida?