DEGREES() Function in MySQL

DEGREES() function in MySQL is used to convert the radian values into degrees. The formula for converting radian to degree is :

π radian = 180 degrees 

Syntax :

DEGREES(X)

Parameter : This method accepts only one parameter.
X : The radian value which we convert to degrees.
Returns : It returns equivalent radian values into degrees.

Example-1 : Finding Degree Value for 0 radian using DEGREES Function.

SELECT DEGREES(0) AS Degree_Value;

Output :

Degree_Value
0

Example-2 : Finding Degree Value for 3.141592653589793 radian using DEGREES Function.

SELECT DEGREES(3.141592653589793) AS Degree_Value;

Output :

Degree_Value
180

Example-3 : Finding Degree Value for -1.5707963267948966 radian using DEGREES Function.

SELECT DEGREES(-1.5707963267948966 ) AS Degree_Value;

Output :

Degree_Value
-90

Example-4 : Using RADIANS Function to convert degrees from radian for a column data. To demonstrate, let us create a table named Polygon.

CREATE TABLE Polygon (
Shape VARCHAR(100) NOT NULL,
Sides INT NOT NULL,
Sum_of_Interior_Angles DECIMAL(10, 2) NOT NULL,
Each_Angle DECIMAL(10, 2) NOT NULL,
PRIMARY KEY(Sides)
);

Now, insert some data to the Polygon table –

INSERT INTO  
Polygon(Shape, Sides, Sum_of_Interior_Angles, Each_Angle)
VALUES
('Triangle', 3, 3.141592653589793, 1.0471975511965976),
('Quadrilateral', 4, 6.283185307179586, 1.5707963267948966),
('Pentagon', 5, 9.42477796076938, 1.8849555921538759),
('Hexagon', 6, 12.566370614359172, 2.0943951023931953),
('Heptagon', 7, 15.707963267948966, 2.2439698192891093),
('Octagon', 8, 18.84955592153876, 2.356194490192345),
('Nonagon', 9, 21.991148575128552, 2.443460952792061),
('Decagon', 10, 25.132741228718345, 2.5132741228718345);

So, the Polygon Table is –

SELECT * FROM Polygon;

Shape	Sides	Sum_of_Interior_Angles	Each_Angle
Triangle	3	3.14159265358979300000	1.0471975511965976
Quadrilateral	4	6.28318530717958600000	1.5707963267948966
Pentagon	5	9.42477796076938	1.8849555921538759
Hexagon	6	12.566370614359172	2.0943951023931953
Heptagon	7	15.707963267948966	2.2439698192891093
Octagon	8	18.84955592153876	2.356194490192345
Nonagon	9	21.991148575128552	2.443460952792061
Decagon	10	25.132741228718345	2.5132741228718345

We can see that sum of interior angles and each angle of the polygon are given in radian. Now we will convert these into degrees with the help of DEGREES Function.

SELECT Shape, Sides, 
DEGREES(Sum_of_Interior_Angles) AS Sum_of_Interior_Angles_InDegree, 
DEGREES(Each_Angle) AS Each_Angle_InDegree
FROM Polygon;

Output :

Shape	Sides	Sum_of_Interior_Angles_InDegree	Each_Angle_InDegree
Triangle	3	180	59.99999999999999
Quadrilateral	4	360	90
Pentagon	5	540	108
Hexagon	6	720	119.99999999999999
Heptagon	7	900	128.57
Octagon	8	1080	135
Nonagon	9	1260	140
Decagon	10	1440	144

So, here the sum of all interior angle, and each angle are converted to equivalent degree value.