HAVING pode fazer o truque sem subconsulta:
SELECT `name`, number, COUNT(1) FROM test GROUP BY `name`, number WITH ROLLUP
HAVING number IS NOT NULL OR `name` IS NULL;
Isso filtra as linhas pós-agrupamento, exceto o total geral:
name number COUNT(1)
------ ------ --------
bar 1 1
bar 2 4
bar 3 1
baz 1 1
baz 2 1
foo 1 2
foo 2 1
foo 3 2
(NULL) (NULL) 13
