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MySQL - LOG10() Function
The MySQL LOG10() function accepts a numerical value as a parameter and returns the base-10 logarithm of the given value.
According to the mathematical definition, a logarithmic function of a number produces a result which is raised by its base to achieve the said number. The most common base values for a logarithms are 'e', 2, and 10. This function will calculate the logarithm of a number with base 10.
In other words, this method provides us the logarithm of any value for a base 10. It follows the formula given below −
log10a = result
Syntax
Following is the syntax of MySQL LOG10() function −
LOG10(X);
Parameters
This function takes a numeric value as a parameter.
Return Value
This function returns the base-10 logarithm of the given value.
Example
The following query uses MySQL LOG10() function to calculate the base-10 logarithm of the number 55 −
SELECT LOG10(55) As Result;
Output
This will produce the following result −
Result |
---|
1.7403626894942439 |
Example
Following is another example of this function, where we are calculating the base-10 logarithm of the decimal number 567439474.4684 −
SELECT LOG10(567439474.4684) As Result;
Output
The output for the query above is produced as given below −
Result |
---|
8.753919544620716 |
Example
If the value passed to the function is less than or equal to 0.0E0, it returns NULL.
Here, we are passing 0 as a parameter to this function −
SELECT LOG10(0) As Result;
The output is displayed as follows −
Result |
---|
NULL |
Now, we are passing -6 as a parameter to this function −
SELECT LOG10(-6) As Result;
Following is the output −
Result |
---|
NULL |
Example
You can also pass the numerical value as a string, to this function −
SELECT LOG10('2656') As Result;
Output
Following is the output −
Result |
---|
3.42422807069598 |
Example
The MySQL LOG10() function is equivalent to LOG(10, X). Following are the examples −
SELECT LOG(10, 44747) As Result;
The output is displayed as follows −
Result |
---|
4.650763923962105 |
Here, we are using the LOG10() function to calculate the base-10 logarithm of the number 44747 −
SELECT LOG10(44747) As Result;
As we can see the output below, both the LOG10() and LOG(10, X) results are same −
Result |
---|
4.650763923962105 |
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