Question: What are the usage percentages of the web frameworks?
SQL:
SELECT WebFrameworks.name, COUNT(WebFrameworks.id) * 100.0 / (SELECT COUNT(DISTINCT Response_id) FROM Response_WebframeHaveWorkedWith) FROM WebFrameworks JOIN Response_WebframeHaveWorkedWith ON WebFrameworks.id = Response_WebframeHaveWorkedWith.WebFrameworks_id GROUP BY WebFrameworks.id