Syntax:
BACKUP TABLE tbl_name [, tbl_name] ... TO '/path/to/backup/directory'

*Note*: This statement is deprecated and is removed in MySQL 5.5. As an
alternative, mysqldump or mysqlhotcopy can be used instead.

BACKUP TABLE copies to the backup directory the minimum number of table
files needed to restore the table, after flushing any buffered changes
to disk. The statement works only for MyISAM tables. It copies the .frm
definition and .MYD data files. The .MYI index file can be rebuilt from
those two files. The directory should be specified as a full path name.
To restore the table, use RESTORE TABLE.

URL: http://dev.mysql.com/doc/refman/5.1/en/backup-table.html

