mysql隨機查詢一條記錄

mysql隨機查詢一條記錄   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;    效率不錯