BYTE_LENGTH function [String]

Returns the number of bytes in a string.

BYTE_LENGTH ( string-expression )

string-expression The string whose length is to be calculated

The following statement returns the value 12:

SELECT BYTE_LENGTH( 'Test Message' ) FROM iq_dummy

Trailing white space characters are included in the length returned.

The return value of a NULL string is NULL.

If the string is in a multibyte character set, the BYTE_LENGTH value differs from the number of characters returned by CHAR_LENGTH.