获取某日期下近几日每一天的日期

SELECT
	@s := @s + 1 AS 'index',
	DATE( DATE_SUB( CURRENT_DATE, INTERVAL @s DAY ) ) AS 'date' 
FROM
	mysql.help_topic,
	( SELECT @s := - 1 ) temp 
WHERE
	@s < 30 
ORDER BY
	'date';

结果：