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Mathematical Functions in SQL
Mathematical functions are very important in SQL to implement different mathematical concepts in queries.
Some of the the major mathematical functions in SQL are as follows −
ABS(X)
This function returns the absolute value of X. For example −
Select abs(-6);
This returns 6.
MOD(X,Y)
The variable X is divided by Y and their remainder is returned. For example −
Select mod(9,5);
This returns 4.
SIGN(X)
This method returns 1 if X is positive, -1 if it is negative and 0 if the value of X is 0. For example −
Select sign(10);
This returns 1.
FLOOR(X)
This returns the largest integer value that is either less than X or equal to it. For example −
Select floor(5.7);
This returns 5.
CEIL(X)
This returns the smallest integer value that is either more than X or equal to it. For example −
Select ceil(5.7);
This returns 6.
POWER(X,Y)
This function returns the value of x raised to the power of Y For example −
Select power(2,5);
This returns 32.
ROUND(X)
This function returns the value of X rounded off to the whole integer that is nearest to it. For example −
Select round(5.7);
This returns 6.
SQRT(X)
This function returns the square root of X. For example −
Select sqrt(9);
This returns 3.
ASIN(X)
This function accepts a Sin value as the input and returns the angle in radians. For example −
Select asin(0);
This returns 0.
ACOS(X)
This function accepts a Cos value as the input and returns the angle in radians. For example −
Select acos(1);
This returns 0.
ATAN(X)
This function accepts a Tan value as the input and returns the angle in radians. For example −
Select atan(0);
This returns 0.
SIN(X)
This function accepts an angle in radians as its parameter and returns its Sine value. For example −
Select sin(0);
This returns 0.
COS(X)
This function accepts an angle in radians as its parameter and returns its Cosine value. For example −
Select cos(0);
This returns 1.
TAN(X)
This function accepts an angle in radians as its parameter and returns its Tan value. For example −
Select tan(0);
This returns 0.
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