MYSQL教程DELIMITER $$
USE `t_girl`$$
DROP FUNCTION IF EXISTS `func_range_string_mod`$$

MYSQL教程CREATE DEFINER=`root`@`localhost` FUNCTION `func_range_string_mod`(
??? f_num INT UNSIGNED -- Total strings.
??? ) RETURNS VARCHAR(200) CHARSET latin1
BEGIN
???
????? DECLARE i INT UNSIGNED DEFAULT 0;
????? DECLARE v_result VARCHAR(200) DEFAULT '';
????? DECLARE v_dict VARCHAR(200) DEFAULT '';
????? SET v_dict = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
????? SET v_dict = LPAD(v_dict,200,v_dict);
????? WHILE i < f_num
????? DO
SET v_result = CONCAT(v_result,SUBSTR(v_dict,CEIL(RAND()*200),1));
??????? SET i = i + 1;
????? END WHILE;
????? RETURN v_result;
??? END$$
DELIMITER ;