SIN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

计算number的正弦函数，输入为弧度值。

命令格式

double|decimal sin(<number>)

参数说明

number：必填。DOUBLE或DECIMAL类型。输入为STRING、BIGINT类型时，会隐式转换为DOUBLE类型后参与运算。

返回值说明

返回DOUBLE或DECIMAL类型。返回规则如下：

number为DOUBLE、DECIMAL类型时会返回相应的类型。
number为STRING、BIGINT类型时，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-0.3048106211022167。
select sin(60);
--返回NULL。
select sin(null);

使用示例：表数据示例

基于示例数据，计算列的正弦值，命令示例如下。

select sin(bigint_data) as bigint_new, sin(double_data) as double_new, sin(decimal_data) as decimal_new, sin(string_data) as string_new from mf_math_fun_t;

返回结果如下。

+----------------------+----------------------+----------------------+----------------------+
| bigint_new           | double_new           | decimal_new          | string_new           |
+----------------------+----------------------+----------------------+----------------------+
| 0.5440211108893698   | 0.5012130046737979   | 0.5012130046737979   | -0.5440211108893698  |
| NULL                 | -0.09983341664682815 | -0.09983341664682815 | 0.5440211108893698   |
| -0.8414709848078965  | NULL                 | 0.9995605376022045   | -0.9880316240928618  |
| -0.7568024953079282  | 0.7770717475268238   | NULL                 | 0.9880316240928618   |
| 0.26237485370392877  | -0.8414709848078965  | -0.8414709848078965  | -0.26237485370392877 |
| -0.27941549819892586 | 0.9974949866040544   | 0.9974949866040544   | 0.26237485370392877  |
| -0.7738906815578891  | -0.9379999767747389  | -0.9379999767747389  | NULL                 |
| 0.8414709848078965   | 0.6998746875935423   | 0.6998746875935423   | -0.8414709848078965  |
| -0.8939966636005579  | 0.5325349075556212   | 0.5325349075556212   | 0.0                  |
| -0.5440211108893698  | 0.46460217941375737  | 0.46460217941375737  | -0.8939966636005579  |
+----------------------+----------------------+----------------------+----------------------+