简单记录mysql中inser into select语句测试

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简单记录mysql中inser into select语句测试_MySQL

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May 31, 2016 am 08:48 AM

mysql迅速制造大批数据，复制一个表中的（部分或全部）数据到另一个表中。

用法：INSERT INTO table_name1 (field1,field2) SELECT field1,field2 FROM table_name2;

前提条件

CREATE TABLE `user` (`id` int(10) NOT NULL AUTO_INCREMENT,`username` varchar(30) NOT NULL,`password` char(32) NOT NULL,PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=utf8;CREATE TABLE `user_his` (`his_id` int(10) NOT NULL AUTO_INCREMENT,`id` int(10) NOT NULL,`username` varchar(30) NOT NULL,`password` char(32) NOT NULL,PRIMARY KEY (`his_id`)) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATETABLE`user`(

`id`int(10)NOT NULLAUTO_INCREMENT,

`username`varchar(30)NOT NULL,

`password`char(32)NOT NULL,

PRIMARY KEY(`id`)

)ENGINE=InnoDBDEFAULTCHARSET=utf8;

CREATETABLE`user_his`(

`his_id`int(10)NOT NULLAUTO_INCREMENT,

`id`int(10)NOT NULL,

`username`varchar(30)NOT NULL,

`password`char(32)NOT NULL,

PRIMARY KEY(`his_id`)

)ENGINE=InnoDBDEFAULTCHARSET=utf8;

mysql> desc user;+----------+-------------+------+-----+---------+----------------+| Field| Type| Null | Key | Default | Extra|+----------+-------------+------+-----+---------+----------------+| id | int(10) | NO | PRI | NULL| auto_increment || username | varchar(30) | NO | | NULL||| password | char(32)| NO | | NULL||+----------+-------------+------+-----+---------+----------------+3 rows in set (0.00 sec)mysql> desc user_his;+----------+-------------+------+-----+---------+----------------+| Field| Type| Null | Key | Default | Extra|+----------+-------------+------+-----+---------+----------------+| his_id | int(10) | NO | PRI | NULL| auto_increment || id | int(10) | NO | | NULL||| username | varchar(30) | NO | | NULL||| password | char(32)| NO | | NULL||+----------+-------------+------+-----+---------+----------------+4 rows in set (0.01 sec)

mysql>descuser;

+----------+-------------+------+-----+---------+----------------+

+----------+-------------+------+-----+---------+----------------+

|id |int(10) |NO |PRI|NULL |auto_increment|

+----------+-------------+------+-----+---------+----------------+

3rowsinset(0.00sec)

mysql>descuser_his;

+----------+-------------+------+-----+---------+----------------+

+----------+-------------+------+-----+---------+----------------+

|his_id |int(10) |NO |PRI|NULL |auto_increment|

|id |int(10) |NO | |NULL | |

+----------+-------------+------+-----+---------+----------------+

4rowsinset(0.01sec)

插入原始数据

mysql> INSERT INTO `user`(`username`,`password`) VALUES ('hello','123456'),('twitter','123456'),('baidu','123456'),('google','123456'),('facebook','123456'),('linux','123456'),('cisco','123456'),('huawei','123456'),('lenovo','123456'),('apple','123456'),('oracle','123456'),('sun','123456');

mysql>INSERTINTO`user`(`username`,`password`)VALUES('hello','123456'),('twitter','123456'),('baidu','123456'),('google','123456'),('facebook','123456'),('linux','123456'),('cisco','123456'),('huawei','123456'),('lenovo','123456'),('apple','123456'),('oracle','123456'),('sun','123456');

复制数据到历史表

mysql> INSERT INTO `user_his`(`id`,`username`,`password`) select `id`,`username`,`password` from `user`;

mysql>INSERTINTO`user_his`(`id`,`username`,`password`)select`id`,`username`,`password`from`user`;

附加mysql大批量复制数据，时间变化：

在自己的电脑上测试（Ubuntu14.04 LTS 64位 + xampp），前3000条数据速度比较快，3000条以后执行时间成倍增加，2万5千条数据执行时间1分钟。314万数据，两分29秒

mysql> insert into user(username,password) select username,password from user;

Query OK, 12 rows affected, 1 warning (0.07 sec)

Records: 12 Duplicates: 0 Warnings: 1

mysql> insert into user(username,password) select username,password from user;

Query OK, 24 rows affected, 1 warning (0.08 sec)

Records: 24 Duplicates: 0 Warnings: 1

mysql> insert into user(username,password) select username,password from user;

Query OK, 48 rows affected, 1 warning (0.11 sec)

Records: 48 Duplicates: 0 Warnings: 1

mysql> insert into user(username,password) select username,password from user;

Query OK, 96 rows affected, 1 warning (0.10 sec)

Records: 96 Duplicates: 0 Warnings: 1

mysql> insert into user(username,password) select username,password from user;

Query OK, 192 rows affected, 1 warning (0.10 sec)

Records: 192 Duplicates: 0 Warnings: 1

mysql> insert into user(username,password) select username,password from user;

Query OK, 384 rows affected, 1 warning (0.10 sec)

Records: 384 Duplicates: 0 Warnings: 1