Oracle® Database SQL Language Reference 11g Release 2 (11.2) Part Number E17118-04 |
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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 3-10, "Implicit Type Conversion Matrix" for more information on implicit conversionThe following example returns the natural logarithm of 95:
SELECT LN(95) "Natural log of 95" FROM DUAL; Natural log of 95 ----------------- 4.55387689