随机取数据

SELECT * FROM tablename ORDER BY RAND() LIMIT 1

SELECT *   

• FROM table_name AS r1 JOIN   

• (SELECT ROUND(RAND() *   

• (SELECT MAX(id)   

• FROM table_name)) AS id)   

• AS r2   

• WHERE r1.id >= r2.id   

• ORDER BY r1.id ASC   

• LIMIT 5;

select *, rand() as random from 'table' order by random limit 1