Oracle LN() function
Oracle LN() returns the natural logarithm of a number that is the base e logarithm of the number, where the number is greater than 0.
The function takes any numeric or nonnumeric data type (can be implicitly converted to a numeric data type) as an argument.
If the argument is BINARY_FLOAT, then the function returns BINARY_DOUBLE. Otherwise the function returns the same numeric data type as the argument.
Where N is a number.
Pictorial Presentation of LN() function
The statement below returns the natural logarithm of 3.
SELECT LN(3) FROM dual;
Here is the result.
LN(3) ---------- 1.09861229
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