MySQL
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Method ABSMethod ACOSMethod ASINMethod ATANMethod ATAN2Method CEILMethod CEILINGMethod CONVMethod COSMethod COTMethod CRC32Method DEGREESMethod EXPMethod FLOORMethod LNMethod LOGMethod LOG10Method LOG2Method MODMethod PIMethod POWMethod POWERMethod RADIANSMethod RANDMethod ROUNDMethod SIGNMethod SINMethod SQRTMethod TANMethod TRUNCATE
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MySQL | LOG method
schedule Aug 12, 2023
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MySQL's LOG(~) method returns the base-B logarithm of an input number X. If we provide an input less than or equal to 0 we will return NULL.
Parameters
1. X | number
The number to return the base-B logarithm for.
2. B | number | optional
The base logarithm to use. Default is base-$e$.
Return value
The value of base-B logarithm of X.
Examples
Basic usage
To return natural logarithm of 256:
SELECT LOG(256);
+-------------------+| LOG(256) |+-------------------+| 5.545177444479562 |+-------------------+
To return base-5 logarithm of 256:
SELECT LOG(5, 256);
+--------------------+| LOG(5, 256) |+--------------------+| 3.4454124645871445 |+--------------------+
NULL return value
To return base-4 logarithm of 0:
SELECT LOG(4, 0);
+-----------+| LOG(4, 0) |+-----------+| NULL |+-----------+
Published by Arthur Yanagisawa
Edited by 0 others
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Official MySQL Documentation
https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_log
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