search
Search
Unlock 100+ guides
search toc
close
Cancel
Post
account_circle
Profile
exit_to_app
Sign out
What does this mean?
Why is this true?
Give me some examples!
search
keyboard_voice
close
Searching Tips
Search for a recipe:
"Creating a table in MySQL"
Search for an API documentation: "@append"
Search for code: "!dataframe"
Apply a tag filter: "#python"
Useful Shortcuts
/ to open search panel
Esc to close search panel
to navigate between search results
d to clear all current filters
Enter to expand content preview
Doc Search
Code Search Beta
SORRY NOTHING FOUND!
mic
Start speaking...
Voice search is only supported in Safari and Chrome.
Shrink
Navigate to
MySQL
295 guides
keyboard_arrow_down
check_circle
Mark as learned
thumb_up
0
thumb_down
0
chat_bubble_outline
0
Comment
auto_stories Bi-column layout
settings

# MySQL | LOG method

schedule Aug 12, 2023
Last updated
local_offer
MySQL
Tags
expand_more
mode_heat
Master the mathematics behind data science with 100+ top-tier guides
Start your free 7-days trial now!

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 |+-----------+ 
Edited by 0 others
thumb_up
thumb_down
Comment
Citation
Ask a question or leave a feedback...
thumb_up
0
thumb_down
0
chat_bubble_outline
0
settings
Enjoy our search
Hit / to insta-search docs and recipes!