今天实践下mysql百万级数据分区的影响，首先是产生百万级别的数据量

//创建带分区的数据表CREATE TABLE `part_person` (  `id` bigint(20) unsigned NOT NULL,  `username` varchar(100) NOT NULL,  `born` date NOT NULL DEFAULT '1970-01-01',  `sex` tinyint(1) unsigned NOT NULL,  PRIMARY KEY (`id`,`born`)) ENGINE=MyISAM DEFAULT CHARSET=utf8PARTITION BY RANGE (year(born))(PARTITION p0 VALUES LESS THAN (1980) ENGINE = MyISAM, PARTITION p1 VALUES LESS THAN (1990) ENGINE = MyISAM, PARTITION p2 VALUES LESS THAN (2000) ENGINE = MyISAM, PARTITION p3 VALUES LESS THAN (2010) ENGINE = MyISAM, PARTITION p4 VALUES LESS THAN (2020) ENGINE = MyISAM, PARTITION p5 VALUES LESS THAN MAXVALUE ENGINE = MyISAM);//创建不带分区的数据表CREATE TABLE `no_part_person` (  `id` bigint(20) unsigned NOT NULL,  `username` varchar(100) NOT NULL,  `born` date NOT NULL DEFAULT '1970-01-01',  `sex` tinyint(1) unsigned NOT NULL,  PRIMARY KEY (`id`,`born`)) ENGINE=MyISAM DEFAULT CHARSET=utf8;//填充数据，创建procedure向数据表插入数据CREATE PROCEDURE `part_generate`(IN num INT)  BEGIN         DECLARE char_str varchar(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';    DECLARE username VARCHAR(25) DEFAULT '';        DECLARE id int UNSIGNED;      DECLARE len int;      set id=1;      DELETE from person;      WHILE id <= num DO          set len = FLOOR(1 + RAND()*25);          set username = '';          WHILE len > 0 DO              SET username = CONCAT(username,substring(char_str,FLOOR(1 + RAND()*62),1));              SET len = len - 1;          END WHILE;           INSERT into part_person VALUES (id,username, ADDDATE('1970-01-01',INTERVAL RAND()*365*60 DAY), FLOOR(RAND()*2));          set id = id + 1;      END WHILE;  END//执行procedure插入600万数据call part_generate(6000000)//向未分区表插入数据 insert into no_part_person select * from part_person;

现在有了数据，对比一下有没有分区对查询的影响