DEGREES
描述
输入一个 double 类型的浮点数,由弧度转换为角度。
- 当参数为 NULL 时,返回 NULL
语法
DEGREES(<a>)
参数
| 参数 | 说明 |
|---|---|
<a> | 需要由弧度转换为角度的值 |
返回值
参数 a 的角度
- 当参数为 NULL 时,返回 NULL
特殊情况
- 当
a为NaN,返回NaN - 当
a为正无穷(Infinity),返回Infinity - 当
a为负无穷(-Infinity),返回-Infinity - 当
a为NULL,返回NULL
举例
select degrees(3.14),degrees(1),degrees(-1),degrees(NULL)
+-------------------------------+----------------------------+-----------------------------+---------------+
| degrees(cast(3.14 as DOUBLE)) | degrees(cast(1 as DOUBLE)) | degrees(cast(-1 as DOUBLE)) | degrees(NULL) |
+-------------------------------+----------------------------+-----------------------------+---------------+
| 179.9087476710785 | 57.29577951308232 | -57.29577951308232 | NULL |
+-------------------------------+----------------------------+-----------------------------+---------------+
select degrees(cast('nan' as double));
+-------------------------------+
| degrees(cast('nan' AS DOUBLE))|
+-------------------------------+
| NaN |
+-------------------------------+
select degrees(cast('inf' as double));
+-------------------------------+
| degrees(cast('inf' AS DOUBLE))|
+-------------------------------+
| Infinity |
+-------------------------------+
select degrees(cast('-inf' as double));
+--------------------------------+
| degrees(cast('-inf' AS DOUBLE))|
+--------------------------------+
| -Infinity |
+--------------------------------+