The SQL Server RADIANS()
function converts an angle from degrees to radians. This function is useful for trigonometric calculations that require angle measurements in radians.
SELECT RADIANS(angle_in_degrees);
The RADIANS()
function takes a single argument:
angle_in_degrees
: The angle in degrees to be converted to radians.Let's look at some examples of SQL Server RADIANS()
function queries:
SELECT RADIANS(180) AS result;
This query converts the angle 180 degrees to radians. The result will be:
result
------
3.141592653589793
SELECT RADIANS(90) AS result;
This query converts the angle 90 degrees to radians. The result will be:
result
------
1.5707963267948966
SELECT angle_in_degrees, RADIANS(angle_in_degrees) AS angle_in_radians
FROM angles;
This query converts the angles in the angle_in_degrees
column to radians for each record in the angles
table. The result will show the original angle_in_degrees
and its corresponding angle_in_radians
.
DECLARE @angle FLOAT;
SET @angle = 60;
SELECT RADIANS(@angle) AS result;
This query uses a variable to store an angle in degrees and then converts it to radians. The result will be:
result
------
1.0471975511965976
Let's go through a complete example that includes creating a table, inserting data, and using the RADIANS()
function.
This step involves creating a new table named angles
to store some sample data.
CREATE TABLE angles (
id INT PRIMARY KEY,
angle_in_degrees FLOAT
);
In this example, we create a table named angles
with columns for id
and angle_in_degrees
.
This step involves inserting some sample data into the angles
table.
INSERT INTO angles (id, angle_in_degrees) VALUES (1, 180);
INSERT INTO angles (id, angle_in_degrees) VALUES (2, 90);
INSERT INTO angles (id, angle_in_degrees) VALUES (3, 60);
INSERT INTO angles (id, angle_in_degrees) VALUES (4, 45);
Here, we insert data into the angles
table.
This step involves using the RADIANS()
function to convert the angle_in_degrees
column to radians.
SELECT id, angle_in_degrees, RADIANS(angle_in_degrees) AS angle_in_radians
FROM angles;
This query retrieves the id
, angle_in_degrees
, and the angle in radians for each row in the angles
table. The result will be:
id angle_in_degrees angle_in_radians
--- ----------------- -----------------
1 180 3.141592653589793
2 90 1.5707963267948966
3 60 1.0471975511965976
4 45 0.7853981633974483
The SQL Server RADIANS()
function is a powerful tool for converting an angle from degrees to radians. Understanding how to use the RADIANS()
function and its syntax is essential for effective trigonometric calculations and data processing in SQL Server.