mysql 需要注意的·
(2011-11-10 14:19:54)
标签:
mysql随机it |
分类: mysql那些事 |
一、实现mysql的随即取数据
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
WHEREt1.id >= t2.id
ORDERBY t1.id LIMIT 1;
WHERE
ORDER