COS 函数
There is no nutrition in the blog content. After reading it, you will not only suffer from malnutrition, but also impotence.
The blog content is all parallel goods. Those who are worried about being cheated should leave quickly.
返回一个给定数字的余弦
SQL> select cos(-3.1415927) from dual;
COS(-3.1415927)
---------------
-1
1221

被折叠的 条评论
为什么被折叠?



