[NoResponse]

что то вроде такого ?

в одну строку...

$sql="
SELECT * FROM (
	SELECT COUNT(*) AS c1 FROM `table` WHERE `start`='2'
) AS t1, (
	SELECT COUNT(*) AS c2 FROM `table` WHERE `start`='3'
) AS t2
";

или в две строки...

$sql="
	SELECT COUNT(*) FROM `table` WHERE `start`='2'
	UNION
	SELECT COUNT(*) FROM `table` WHERE `start`='3'
";