The STRING SIZES ARE IN clause is used to indicate whether the lengths specified for character strings are in bytes or characters. If this clause is not specified, then the access driver uses the mode that the database uses. Character types with embedded lengths (such as VARCHAR) are also affected by this clause. If this clause is specified, then the embedded lengths are a character count, not a byte count. Specifying STRING SIZES ARE IN CHARACTERS is needed only when loading multibyte character sets, such as UTF16.