#方法一

SELECT
	count(DISTINCT(id)) ,
	count(DISTINCT(pid)) 
FROM
	push_platform_upd
WHERE
	datediff(NOW(), last_dt) <= 30

#方法二

SELECT
	count(DISTINCT(id)) ,
	count(DISTINCT(pid))
FROM
	push_platform_upd
WHERE
	last_dt >= DATE_SUB(
		DATE_FORMAT(NOW(), '%Y-%m-%d'),
		INTERVAL 30 DAY
	)