MySQL
keyboard_arrow_down 295 guides
chevron_leftString
Method ASCIIMethod BINMethod BIT_LENGTHMethod CHARMethod CHAR_LENGTHMethod CHARACTER_LENGTHMethod CONCATMethod CONCAT_WSMethod ELTMethod EXPORT_SETMethod FIELDMethod FIND_IN_SETMethod FORMATMethod FROM_BASE64Method HEXMethod INSERTMethod INSTRMethod LCASEMethod LEFTMethod LENGTHMethod LOAD_FILEMethod LOCATEMethod LOWERMethod LPADMethod LTRIMMethod MAKE_SETMethod MIDMethod OCTMethod OCTET_LENGTHMethod ORDMethod POSITIONMethod QUOTEMethod REPEATMethod REPLACEMethod REVERSEMethod RIGHTMethod RPADMethod RTRIMMethod SOUNDEXMethod SPACEMethod STRCMPMethod SUBSTRMethod SUBSTRINGMethod SUBSTRING_INDEXMethod TO_BASE64Method TRIMMethod UCASEMethod UNHEXMethod UPPERMethod WEIGHT_STRING
check_circle
Mark as learned thumb_up
0
thumb_down
0
chat_bubble_outline
0
Comment auto_stories Bi-column layout
settings
MySQL | BIT_LENGTH method
schedule Aug 12, 2023
Last updated local_offer
Tags MySQL
tocTable of Contents
expand_more Master the mathematics behind data science with 100+ top-tier guides
Start your free 7-days trial now!
Start your free 7-days trial now!
MySQL's BIT_LENGTH(~) method returns the length of a string in bits.
Parameters
1. str | string
The string whose length we want to return.
Return value
The length of the input string in bits.
Examples
Consider the following table about some students:
student_id | fname | lname | day_enrolled | age | username |
|---|---|---|---|---|---|
1 | Sky | Towner | 2015-12-03 | 17 | stowner1 |
2 | Ben | Davis | 2016-04-20 | 19 | bdavis2 |
3 | Travis | Apple | 2018-08-14 | 18 | tapple3 |
4 | Arthur | David | 2016-04-01 | 16 | adavid4 |
5 | Benjamin | Town | 2014-01-01 | 17 | btown5 |
The above sample table can be created using the code here.
Basic usage
To return length of student first names in bits:
SELECT BIT_LENGTH(fname)FROM students;
-------------------+| BIT_LENGTH(fname) |+-------------------+| 24 || 24 || 48 || 48 || 64 |+-------------------+
Each character is represented using 1 byte (8bits) as these are ASCII characters.
To check bits used to represent the Japanese character 'あ':
SELECT BIT_LENGTH('あ');
+-------------------+| BIT_LENGTH('あ') |+-------------------+| 24 |+-------------------+
The Japanese character 'あ' is stored using 3 bytes, hence the length is 24 bits.
Published by Arthur Yanagisawa
Edited by 0 others
Did you find this page useful?
thumb_up
thumb_down
Comment
Citation
Ask a question or leave a feedback...
Official MySQL Documentation
https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_bit-length
thumb_up
0
thumb_down
0
chat_bubble_outline
0
settings
Enjoy our search
Hit / to insta-search docs and recipes!
