LN
Syntax
Purpose
LN
returns the natural logarithm of n
, where n
is greater than 0.
This function takes as an argument any numeric data type or any nonnumeric data type that can be implicitly converted to a numeric data type. If the argument is BINARY_FLOAT
, then the function returns BINARY_DOUBLE
. Otherwise the function returns the same numeric data type as the argument.
See Also:
Table 2-8 for more information on implicit conversion
Examples
The following example returns the natural logarithm of 95:
SELECT LN(95) "Natural log of 95" FROM DUAL; Natural log of 95 ----------------- 4.55387689