MySQL随机生成固定长度字符串函数

DELIMITER $$ CREATE FUNCTION `ecmall`.`rand_string`(n int) RETURNS varchar(255) BEGIN DECLARE chars_str varchar(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'; DECLARE return_str varchar(255) DEFAULT ''; DECLARE i INT DEFAULT 0; WHILE i < n DO SET return_str = concat(return_str,substring(chars_str , FLOOR(1 + RAND()*62 ),1)); SET i = i +1; END WHILE; RETURN return_str; END$$ DELIMITER ;   

你可能感兴趣的:(mysql,function,String)