The SQL Server DEGREES()
function converts an angle from radians to degrees. This function is useful for converting radian measurements to degree measurements in trigonometric calculations.
SELECT DEGREES(angle_in_radians);
The DEGREES()
function takes a single argument:
angle_in_radians
: The angle in radians to be converted to degrees.Let's look at some examples of SQL Server DEGREES()
function queries:
SELECT DEGREES(PI()) AS result;
This query converts the angle π radians to degrees. The result will be:
result
------
180
SELECT DEGREES(PI()/2) AS result;
This query converts the angle π/2 radians (90 degrees) to degrees. The result will be:
result
------
90
SELECT angle_in_radians, DEGREES(angle_in_radians) AS angle_in_degrees
FROM angles;
This query converts the angles in the angle_in_radians
column to degrees for each record in the angles
table. The result will show the original angle_in_radians
and its corresponding angle_in_degrees
.
DECLARE @angle FLOAT;
SET @angle = PI()/3;
SELECT DEGREES(@angle) AS result;
This query uses a variable to store an angle in radians and then converts it to degrees. The result will be:
result
------
60
Let's go through a complete example that includes creating a table, inserting data, and using the DEGREES()
function.
This step involves creating a new table named example_table
to store some sample data.
CREATE TABLE example_table (
id INT PRIMARY KEY,
angle_in_radians FLOAT
);
In this example, we create a table named example_table
with columns for id
and angle_in_radians
.
This step involves inserting some sample data into the example_table
.
INSERT INTO example_table (id, angle_in_radians) VALUES (1, PI());
INSERT INTO example_table (id, angle_in_radians) VALUES (2, PI()/2);
INSERT INTO example_table (id, angle_in_radians) VALUES (3, PI()/3);
INSERT INTO example_table (id, angle_in_radians) VALUES (4, PI()/4);
Here, we insert data into the example_table
.
This step involves using the DEGREES()
function to convert the angle_in_radians
column to degrees.
SELECT id, angle_in_radians, DEGREES(angle_in_radians) AS angle_in_degrees
FROM example_table;
This query retrieves the id
, angle_in_radians
, and the angle in degrees for each row in the example_table
. The result will be:
id angle_in_radians angle_in_degrees
--- ----------------- -----------------
1 3.1415926536 180
2 1.5707963268 90
3 1.0471975512 60
4 0.7853981634 45
The SQL Server DEGREES()
function is a powerful tool for converting an angle from radians to degrees. Understanding how to use the DEGREES()
function and its syntax is essential for effective trigonometric calculations and data processing in SQL Server.