MySQL BIT_LENGTH() Function

The MySQL BIT_LENGTH() function returns the length of the specified string in bits.

Syntax

BIT_LENGTH(string)

Parameters

string Required. Specify the string to return the length for.

Return Value

Returns the length of the specified string in bits.

Example 1:

The example below shows the usage of BIT_LENGTH() function.

mysql> SELECT BIT_LENGTH('Learning SQL is FUN!');
Result: 160

mysql> SELECT BIT_LENGTH(NULL);
Result: NULL

mysql> SELECT BIT_LENGTH('');
Result: 0

mysql> SELECT BIT_LENGTH(' ');
Result: 8

mysql> SELECT BIT_LENGTH('SQL Tutorial');
Result: 96

Example 2:

Consider a database table called Employee with the following records:

EmpID	Name	City	Age	Salary
1	John	London	25	3000
2	Marry	New York	24	2750
3	Jo	Paris	27	2800
4	Kim	Amsterdam	30	3100
5	Ramesh	New Delhi	28	3000
6	Huang	Beijing	28	2800

The statement given below can be used to get the length of records of City column in bits.

SELECT *, BIT_LENGTH(City) AS BIT_LENGTH_Value FROM Employee;

The query will produce the following result:

EmpID	Name	City	Age	BIT_LENGTH_Value
1	John	London	25	72
2	Marry	New York	24	96
3	Jo	Paris	27	60
4	Kim	Amsterdam	30	108
5	Ramesh	New Delhi	28	108
6	Huang	Beijing	28	84

❮ MySQL Functions