RADIANS

描述

返回x的弧度值, 从度转换为弧度.

语法

RADIANS(<x>)

参数

参数	说明
<x>	需要被计算的从度

返回值

返回一个整型或者浮点数。特殊情况：

• 当参数 x is NULL，返回 NULL

举例

select radians(0);

+----------------------------+
| radians(cast(0 as DOUBLE)) |
+----------------------------+
|                        0.0 |
+----------------------------+

select radians(30);

+-----------------------------+
| radians(cast(30 as DOUBLE)) |
+-----------------------------+
|          0.5235987755982988 |
+-----------------------------+

select radians(90);

+-----------------------------+
| radians(cast(90 as DOUBLE)) |
+-----------------------------+
|          1.5707963267948966 |
+-----------------------------+