SELECT COUNT(id) FROM person_info_large;
EXPLAIN SELECT account FROM person_info_large ORDER BY account DESC;

首先，当然是建一个数据表，注意数据表的引擎使用的是 INNODB：

CREATE TABLE `person_info_large` (  
    `id` INT (7) NOT NULL AUTO_INCREMENT,  
    `account` VARCHAR (10),   
    `name` VARCHAR (20),  
    `area` VARCHAR (20),  
    `title` VARCHAR (20), 
    `motto` VARCHAR (50),
    PRIMARY KEY (`id`),  
    UNIQUE(`account`),
    KEY `index_area_title`(`area`,`title`) 
) ENGINE = INNODB AUTO_INCREMENT = 1 DEFAULT CHARSET = utf8  

创建存储过程：

CREATE TABLE `person_info_large` (  
    `id` INT (7) NOT NULL AUTO_INCREMENT,  
    `account` VARCHAR (10),   
    `name` VARCHAR (20),  
    `area` VARCHAR (20),  
    `title` VARCHAR (20), 
    `motto` VARCHAR (50),
    PRIMARY KEY (`id`),  
    UNIQUE(`account`),
    KEY `index_area_title`(`area`,`title`) 
) ENGINE = INNODB AUTO_INCREMENT = 1 DEFAULT CHARSET = utf8  
 
DELIMITER $$
CREATE FUNCTION `rand_string`(n INT) RETURNS varchar(255) CHARSET utf8
BEGIN
DECLARE chars_str varchar(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
DECLARE return_str varchar(255) DEFAULT '' ;
DECLARE i INT DEFAULT 0;
WHILE i < n DO
SET return_str = concat(return_str,substring(chars_str , FLOOR(1 + RAND()*12 + RAND()*50),1));
SET i = i +1;
END WHILE;
RETURN return_str;
END $$
 
DELIMITER $$
CREATE  PROCEDURE `test`.`person_info_large`(IN n int)  
BEGIN    
  DECLARE i INT DEFAULT 1;  
    WHILE (i <= n ) DO  
      INSERT into person_info_large  (account,name,area,title, motto) VALUEs (rand_string(10),rand_string(20),rand_string(20) ,rand_string(20),rand_string(50));  
            set i=i+1;  
    END WHILE;  
END $$

调用存储过程：

call person_info_large(2000000);

今天在写存储过程保存的时候，突然提示下面的错误：PROCEDURE pro_tb_user already exists

解决办法：

DROP PROCEDURE person_info_large;