I tried this
SELECT A.sex, A.index, A.Level as lev, count(A.ID) as X, B.Y
FROM MYtable A INNER JOIN (SELECT sex, index, count(ID) AS Y FROM MYtable) B ON A.sex=B.sex AND A.Index=B.Index
GROUP BY A.sex, A.index, lev
sex is not part of agg function
I modified query to this
SELECT...