MySQL实现循环插入功能

MySQL实现循环插入功能

MySQL 不支持直接写SQL 语句实现循环插入功能. 想要实现该功能的方法有：用其他语言操控MySql或者用存储过程来实现两种。

1、存储过程实现
A、表结构 （Create Table song）
------ ----------------------------------------------------------------------------------------
  CREATE TABLE `song` (
          `id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'Autoincreament element',
          `name` text NOT NULL,
          `datetime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
          `rank` int(11) NOT NULL,
          PRIMARY KEY (`id`)
        ) ENGINE=MyISAM AUTO_INCREMENT=8102001 DEFAULT CHARSET=gbk

B、定义存储过程
DELIMITER $$
DROP PROCEDURE IF EXISTS `test`.`sp_insert_batch`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_insert_batch`(IN number int(11))
BEGIN
  declare i int(11);
  set i = 1;
  -- such as 1-2000,2000-4000,....
  WHILE i <= number DO
    if mod(i,2000)=1 then
       set @sqltext =concat('(''',concat('t',i),''',''',now(),''',',ceil(10*rand()),')');
    elseif mod(i,2000)=0 then
       set @sqltext=concat(@sqltext,',(''',concat('t',i),''',''',now(),''',',ceil(10*rand()),')');
       set @sqltext=concat('insert into song (name,datetime,rank) values',@sqltext);
       prepare stmt from @sqltext;
       execute stmt;
       DEALLOCATE PREPARE stmt;
       set @sqltext='';
    else
       set @sqltext=concat(@sqltext,',(''',concat('t',i),''',''',now(),''',',ceil(10*rand()),')');
    end if;
    set i = i + 1;
  END WHILE;
  -- process when number is not be moded by 2000
  -- such as 2001,4002,15200,...
  if @sqltext<>'' then
     set @sqltext=concat('insert into song (name,datetime,rank) values',@sqltext);
     prepare stmt from @sqltext;
     execute stmt;
     DEALLOCATE PREPARE stmt;
     set @sqltext='';
  end if;
END$$
DELIMITER ;
C、调用存储过程
call sp_insert_batch (100); --参数为需要插入的行数

2、用其他语言操控MySql实现(以shell为例)
for ((i=1;i<=1000;i++));
do `mysql test -e "insert into t1(idx,pw) value($i,md5($i));"`;
done