取出多条（最大值-最小值）* 随机数 +最小值
SELECT * FROM users WHERE userId >= ((SELECT MAX(userId) FROM users)-(SELECT MIN(userId) FROM users)) * RAND() + (SELECT MIN(userId) FROM users) LIMIT 1
做项目中遇到所有的常用知识点（javascript、php、mysql、apache、nginx）更新
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做项目中遇到所有的常用知识点（javascript、php、mysql、apache、nginx）更新
* (SELECT MAX(id) FROM `table`)) AS id) AS t2
WHERE t1.id >= t2.id
ORDER BY t1.id ASC LIMIT 5;