How to use LN function find logarithmic values in MySQL using Command Prompt and Workbench with example?. MySQL LN function is one of the Mathematical Functions, which is useful to return the natural logarithmic value of a given number with base E.
The basic syntax of the LN in MySQL is as shown below:
SELECT LN (x) FROM Source
If x is less than or equal to 0.0E0, then the function returns the NULL value as output.
MySQL LN Function Example 1
The LN function returns the natural logarithmic value of any numeric value. The next query shows multiple ways to use the LN function.
-- MySQL LN Function Example SELECT LN(2); SELECT LN(0); SELECT LN(-5); SELECT LN(10);
OUTPUT
MySQL LN Example 2
The LN function also allows you to find the logarithmic value of a column data. To demonstrate this LN Mathematical Function, we are going to use the below-shown data
In this MySQL example, we are going to find the logarithmic values for all the records present in the ServiceGrade column.
-- MySQL LN Example SELECT Product, Color, StandardCost, Sales, TaxAmt, ServiceGrade, LN(ServiceGrade) AS GradeLog FROM mysqltutorial.`numeric functions`;
OUTPUT