SELECT * FROM `table` AS t1 JOIN (SELECT ROUND(RAND() * ((SELECT MAX(id) FROM `table`)-(SELECT MIN(id) FROM `table`))+(SELECT MIN(id) FROM `table`)) AS id) AS t2 WHERE t1.id >= t2.id ORDER BY t1.id LIMIT 1;
数据库中随机选出一条记录select * from table order by rand() limit 1;
WHERE t1.id >= t2.id
ORDER BY t1.id LIMIT 1;