Oracle® Database SQL Reference 10g Release 1 (10.1) Part Number B10759-01 |
|
|
View PDF |
LOG
returns the logarithm, base m
, of n
. The base m
can be any positive value other than 0 or 1 and n
can be any positive value.
This function takes as arguments any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. If any argument is BINARY_FLOAT
or BINARY_DOUBLE
, then the function returns BINARY_DOUBLE
. Otherwise the function returns NUMBER
.
The following example returns the log of 100:
SELECT LOG(10,100) "Log base 10 of 100" FROM DUAL; Log base 10 of 100 ------------------ 2