类别：: 数值函数（三角函数）

SIN¶

计算其实参的正弦值；实参应以弧度表示。

语法¶

SIN( <input_expr> )

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实参¶

input_expr: The value or expression to operate on. The value must be in radians, not degrees. The data type must be FLOAT.

返回¶

This function returns a value of type FLOAT.

示例¶

SELECT SIN(0), SIN(PI()/3), SIN(RADIANS(90));

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+--------+--------------+------------------+
| SIN(0) |  SIN(PI()/3) | SIN(RADIANS(90)) |
|--------+--------------+------------------|
|      0 | 0.8660254038 |                1 |
+--------+--------------+------------------+