标签：mysq mysql div logs gre class sel span 弧度
DEGREES(x) 用于将参数 x 由弧度转化为角度
mysql> SELECT DEGREES(PI()), DEGREES(PI()/2); +---------------+-----------------+ | DEGREES(PI()) | DEGREES(PI()/2) | +---------------+-----------------+ | 180 | 90 | +---------------+-----------------+
标签：mysq mysql div logs gre class sel span 弧度
原文地址：http://www.cnblogs.com/pzk7788/p/6891880.html
