mysql获取随机数条数

SELECT *
FROM `cw_shop_goods` AS t1 JOIN (SELECT ROUND(RAND() * ((SELECT MAX(id) FROM `cw_shop_goods`)-(SELECT MIN(id) FROM `cw_shop_goods`))+(SELECT MIN(id) FROM `cw_shop_goods`)) AS id) AS t2
WHERE t1.id >= t2.id
ORDER BY t1.id LIMIT 1;

mysql获取随机数条数