AND count_sub>2 AND count_del<=2

count_sub = 10
count_del = 4

count_sub = 4
count_del = 1

WHERE count_sub - count_del > 5

SELECT a.id
FROM tbl1 a
INNER JOIN (SELECT id, count_sub - count_del AS diff FROM tbl1) b ON b.id = a.id
WHERE b.diff > 5