PHP开发教程

MySQL atan()函数

ATAN(X)

该函数返回X的反正切。

mysql> SELECT ATAN(1);
+---------------------------------------------------------+
| ATAN(1)                                                 |
+---------------------------------------------------------+
| 0.78539816339745                                        |
+---------------------------------------------------------+
1 row in set (0.00 sec)


Powered by PHP二次开发 ©2008-2017