MySql查询随机几条数据_MySQL

bitsCN.com

MySql查询随机几条数据

 

想到了  Max  RAND  这几个函数

用以下2种办法都可以实现查询。  速度还行。

 

几十万数据左右， 没有什么问题。

 

SELECT * FROM `news`

WHERE id >= (SELECT floor(RAND() * (SELECT MAX(id) FROM `news`))) 

LIMIT 10;

 

SELECT *

FROM `news` AS t1 JOIN (SELECT ROUND(RAND() * ((SELECT MAX(id) FROM `news`)-(SELECT MIN(id) FROM `news`))+(SELECT MIN(id) FROM `news`)) AS id) AS t2

WHERE t1.id >= t2.id

 LIMIT 10;

 

来源 http://blog.csdn.net/yjflinchong/article/details/8444417
 

bitsCN.com