标签：范围 color 随机 mysql sel pre nbsp and class
RAND(x) 用于返回一个随机浮点值，范围在 0~1 之间，x 被用作种子值，用来产生重复序列
mysql> SELECT RAND(5), RAND(5), RAND(8); +---------------------+---------------------+---------------------+ | RAND(5) | RAND(5) | RAND(8) | +---------------------+---------------------+---------------------+ | 0.40613597483014313 | 0.40613597483014313 | 0.15668530311126755 | +---------------------+---------------------+---------------------+
标签：范围 color 随机 mysql sel pre nbsp and class
原文地址：http://www.cnblogs.com/pzk7788/p/6891751.html
