SELECT

			group_concat(
				`tf_business_goods_info`.`id`
				ORDER BY
					cast(
						`tf_business_goods_info`.`original_price` AS DECIMAL (10, 2)
					) ASC SEPARATOR ','
			)
	FROM
		`tf_business_goods_info`
	GROUP BY
		`tf_business_goods_info`.`master_id`

就是根据分组把这个一行展示出来

取第几个