成佩涛编程之路——Mysql分表操作

一、利用merge存储引擎来实现分表

1、创建分表，和主表的表结构相同，这里创建3个表

 CREATE TABLE 新表 LIKE 旧表;
 CREATE TABLE cpthack1 LIKE cpthack;

2、复制主表数据到分表

 INSERT INTO cpthack1 SELECT * FROM cpthack LIMIT 50000;
 INSERT INTO cpthack2 SELECT * FROM cpthack LIMIT 50001,50000;
 INSERT INTO cpthack3 SELECT * FROM cpthack LIMIT 100002,50000;

3、创建汇总表cpthackall

 CREATE TABLE cpthackAll LIKE cpthack;
 ALTER TABLE cpthackall  ENGINE=MERGE UNION=(cpthack1,cpthack2,cpthack3) INSERT_METHOD=LAST;

这样插入新的数据会插入的cpthack3，最后一个表中

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以下是测试实例：

将代码copy之后保存为xxx.sql文件即可

/*
Navicat MySQL Data Transfer


Source Server         : localhost
Source Server Version : 50045
Source Host           : localhost:3306
Source Database       : cpt1


Target Server Type    : MYSQL
Target Server Version : 50045
File Encoding         : 65001


Date: 2014-05-09 16:34:21
*/


SET FOREIGN_KEY_CHECKS=0;


-- ----------------------------
-- Table structure for `user`
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` int(11) NOT NULL auto_increment,
  `name` varchar(50) default NULL,
  `description` varchar(20) default NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;


-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('2', 'cpthack', '12312312312312312312');


-- ----------------------------
-- Table structure for `user1`
-- ----------------------------
DROP TABLE IF EXISTS `user1`;
CREATE TABLE `user1` (
  `id` int(11) NOT NULL auto_increment,
  `name` varchar(50) default NULL,
  `description` varchar(20) default NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=459 DEFAULT CHARSET=utf8;


-- ----------------------------
-- Records of user1
-- ----------------------------
INSERT INTO `user1` VALUES ('100', '123', '13123');
INSERT INTO `user1` VALUES ('101', 'test', '成佩涛测试的数据');
INSERT INTO `user1` VALUES ('102', 'test', '成佩涛测试的数据');
INSERT INTO `user1` VALUES ('103', 'test', '成佩涛测试的数据');
INSERT INTO `user1` VALUES ('104', 'test', '成佩涛测试的数据');
INSERT INTO `user1` VALUES ('105', 'test', '成佩涛测试的数据');
INSERT INTO `user1` VALUES ('106', 'test', '成佩涛测试的数据');
INSERT INTO `user1` VALUES ('107', 'test', '成佩涛测试的数据');


-- ----------------------------
-- Table structure for `userall`
-- ----------------------------
DROP TABLE IF EXISTS `userall`;
CREATE TABLE `userall` (
  `id` int(11) NOT NULL auto_increment,
  `name` varchar(50) default NULL,
  `description` varchar(20) default NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MRG_MyISAM DEFAULT CHARSET=utf8 INSERT_METHOD=LAST UNION=(`user`,`user1`);


-- ----------------------------
-- Records of userall
-- ----------------------------
INSERT INTO `userall` VALUES ('2', 'cpthack', '12312312312312312312');
INSERT INTO `userall` VALUES ('100', '123', '13123');
INSERT INTO `userall` VALUES ('101', 'test', '成佩涛测试的数据');
INSERT INTO `userall` VALUES ('102', 'test', '成佩涛测试的数据');
INSERT INTO `userall` VALUES ('252', 'test', '成佩涛测试的数据');
INSERT INTO `userall` VALUES ('253', 'test', '成佩涛测试的数据');
INSERT INTO `userall` VALUES ('254', 'test', '成佩涛测试的数据');
INSERT INTO `userall` VALUES ('255', 'test', '成佩涛测试的数据');
INSERT INTO `userall` VALUES ('256', 'test', '成佩涛测试的数据');
INSERT INTO `userall` VALUES ('257', 'test', '成佩涛测试的数据');

PS：本文关键词 ：mysql分表  mysql merge分表