DEGREES命令格式、参数和返回值_云原生大数据计算服务 MaxCompute(MaxCompute)-阿里云帮助中心

将弧度转换为角度。

命令格式

double degrees(<number>)

参数说明

number：必填。DOUBLE、BIGINT、INT、SMALLINT、TINYINT、FLOAT、DECIMAL、STRING类型。此函数为MaxCompute 2.0扩展函数。

返回值说明

返回DOUBLE类型。number值为NULL时，返回NULL。

示例数据

为便于理解各函数的使用方法，本文为您提供源数据，基于源数据提供函数相关示例。创建表mf_math_fun_t，并添加数据，命令示例如下。

create table if not exists mf_math_fun_t(
     int_data     int,
     bigint_data  bigint,
     double_data  double,
     decimal_data decimal,
     float_data   float,
     string_data  string
    );
insert into mf_math_fun_t values
(null, -10, 0.525, 0.525BD, cast(0.525 as float), '10'),
(-20, null, -0.1, -0.1BD, cast(-0.1 as float), '-10'),
(0, -1, null, 20.45BD, cast(-1 as float), '30'),
(-40, 4, 0.89, null, cast(0.89 as float), '-30'),
(5, -50, -1, -1BD, null, '50'),
(-60, 6, 1.5, 1.5BD, cast(1.5 as float), '-50'),
(-1, -70, -7.5, -7.5BD, cast(-7.5 as float),null ),
(-80, 1, -10.2, -10.2BD, cast(-10.2 as float), '-1' ),
(9, -90, 2.58, 2.58BD, cast(2.58 as float), '0'),
(-100, 10, -5.8, -5.8BD, cast(-5.8 as float), '-90');

查询表mf_math_fun_t中的数据，命令示例如下：

select * from mf_math_fun_t;
--返回结果。
+------------+-------------+-------------+--------------+------------+-------------+
| int_data   | bigint_data | double_data | decimal_data | float_data | string_data |
+------------+-------------+-------------+--------------+------------+-------------+
| NULL       | -10         | 0.525       | 0.525        | 0.525      | 10          |
| -20        | NULL        | -0.1        | -0.1         | -0.1       | -10         |
| 0          | -1          | NULL        | 20.45        | -1.0       | 30          |
| -40        | 4           | 0.89        | NULL         | 0.89       | -30         |
| 5          | -50         | -1.0        | -1           | NULL       | 50          |
| -60        | 6           | 1.5         | 1.5          | 1.5        | -50         |
| -1         | -70         | -7.5        | -7.5         | -7.5       | NULL        |
| -80        | 1           | -10.2       | -10.2        | -10.2      | -1          |
| 9          | -90         | 2.58        | 2.58         | 2.58       | 0           |
| -100       | 10          | -5.8        | -5.8         | -5.8       | -90         |
| NULL       | -10         | 0.525       | 0.525        | 0.525      | 10          |
| -20        | NULL        | -0.1        | -0.1         | -0.1       | -10         |
| 0          | -1          | NULL        | 20.45        | -1.0       | 30          |
| -40        | 4           | 0.89        | NULL         | 0.89       | -30         |
| 5          | -50         | -1.0        | -1           | NULL       | 50          |
| -60        | 6           | 1.5         | 1.5          | 1.5        | -50         |
| -1         | -70         | -7.5        | -7.5         | -7.5       | NULL        |
| -80        | 1           | -10.2       | -10.2        | -10.2      | -1          |
| 9          | -90         | 2.58        | 2.58         | 2.58       | 0           |
| -100       | 10          | -5.8        | -5.8         | -5.8       | -90         |
+------------+-------------+-------------+--------------+------------+-------------+

使用示例：静态数据示例

--返回90.0。
select degrees(1.5707963267948966);
--返回0.0。
select degrees(0);
--返回NULL。
select degrees(null);

使用示例：表数据示例

基于示例数据，获取所有列对应的角度，命令示例如下。

--开启2.0新类型。此命令需要与SQL语句一起提交。
set odps.sql.type.system.odps2=true;
select degrees(int_data) as int_new, degrees(bigint_data) as bigint_new, degrees(double_data) as double_new, degrees(decimal_data) as decimal_new, degrees(float_data) as float_new, degrees(string_data) as string_new from mf_math_fun_t;

返回结果如下。

+---------------------+---------------------+---------------------+---------------------+---------------------+---------------------+
| int_new             | bigint_new          | double_new          | decimal_new         | float_new           | string_new          |
+---------------------+---------------------+---------------------+---------------------+---------------------+---------------------+
| NULL                | -572.9577951308232  | 30.08028424436822   | 30.08028424436822   | 30.080282878330387  | 572.9577951308232   |
| -1145.9155902616465 | NULL                | -5.729577951308232  | -5.729577951308232  | -5.729578036685597  | -572.9577951308232  |
| 0.0                 | -57.29577951308232  | NULL                | 1171.6986910425335  | -57.29577951308232  | 1718.8733853924698  |
| -2291.831180523293  | 229.1831180523293   | 50.99324376664326   | NULL                | 50.99324294702057   | -1718.8733853924698 |
| 286.4788975654116   | -2864.7889756541163 | -57.29577951308232  | -57.29577951308232  | NULL                | 2864.7889756541163  |
| -3437.7467707849396 | 343.77467707849394  | 85.94366926962348   | 85.94366926962348   | 85.94366926962348   | -2864.7889756541163 |
| -57.29577951308232  | -4010.7045659157625 | -429.71834634811745 | -429.71834634811745 | -429.71834634811745 | NULL                |
| -4583.662361046586  | 57.29577951308232   | -584.4169510334397  | -584.4169510334397  | -584.416940105137   | -57.29577951308232  |
| 515.662015617741    | -5156.620156177409  | 147.8231111437524   | 147.8231111437524   | 147.82310677243132  | 0.0                 |
| -5729.5779513082325 | 572.9577951308232   | -332.31552117587745 | -332.31552117587745 | -332.31553210418014 | -5156.620156177409  |
+---------------------+---------------------+---------------------+---------------------+---------------------+---------------------+