In SQL, the RADIANS() convert a degree value into radians.

**SQL RADIANS()**

SQL RADIANS() is a. built-in function that is used for converting the angle in the degree to approximate angle measured in radians. SQL ROUND() function rounds the number to a particular number of decimal places. It returns a numeric value, rounded to the specified length or precision.

**Syntax**

Select Radians (Number);

**Parameters**

Number: The angle in degree whose angle in radians is to be calculated. It can be an expression of any numeric data type category, except for the bit data type.

**Formula**

Degrees*π/180 = X radians.

**Examples**

**Query 1**

Select Radians (180);

**Output**

3

**Explanation**

Here, 180 represented in degree gets converted to its equivalent radians.

**Query 2**

Select Radians (180.0);

**Output**

3.141592653589793116

**Explanation**

Here, 180 represented in degree gets converted to its equivalent radians. The result from the above example was different as the degree was expressed in the form of fractions.

**Query 3**

Select Radians (-45);

**Output**

-0.7853981633974483

**Explanation**

Here, -45 degrees represented in degree gets converted to its equivalent radians. Result returned was negative because the degree was also represented in negative form.

**Query 4**

Select Radians (0);

**Output**

0

**Explanation**

The value of 0 in degree is similar to its value in radians.

**Query 5**

Select Radians (45*4);

**Output**

3

**Explanation**

The above expression is similar to 180 degrees as (45*4) results are the same expression.