How many of the worst actors are men and how many of the worst actors are women? Indicate your answer in ratio form.
The worst actors means a_quality = 0; Men and male share the same meaning; men actors refers to a_gender = 'M'
SELECT CAST(SUM(IIF(a_gender = 'M', 1, 0)) AS REAL) / SUM(IIF(a_gender = 'F', 1, 0)) FROM actors WHERE a_quality = 0