MySQL->复制表[20180509]

MySQL复制表

    通常复制表所采用CREATE TABLE .... SELECT 方式将资料复制，但无法将旧表中的索引，约束(除非空以外的)也复制。

 

完整复制MySQL数据表所需步骤：

方式一

    1.使用SHOW CREATE TABLE 命令获取创建数据表的create table语句，语句会包含原表的结构，索引，存储引擎，字符集。

    2.更改其中的表名称，再执行create table语句。

    3.复制表的资料，使用INSERT INTO ... SELECT 语句。

方式二

    CREATE TABLE <table_name> LIKE <old_table>;

     INSERT INTO <table_name> SELECT * FROM <old_table>;

 

 

获取创建表的SQL语句：

mysql> show create table index_tab01\G

*************************** 1. row ***************************

       Table: index_tab01

Create Table: CREATE TABLE `index_tab01` (

  `id` int(11) NOT NULL DEFAULT '0',

  `col01` varchar(10) NOT NULL DEFAULT '',

  `col02` text,

  UNIQUE KEY `index_un` (`col01`),

  KEY `indx_01` (`col01`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8

1 row in set (0.00 sec)

 

更改表名称，后执行创建语句：

mysql> CREATE TABLE `copy_tab01` (

    ->   `id` int(11) NOT NULL DEFAULT '0',

    ->   `col01` varchar(10) NOT NULL DEFAULT '',

    ->   `col02` text,

    ->   UNIQUE KEY `index_un` (`col01`),

    ->   KEY `indx_01` (`col01`)

    -> ) ENGINE=InnoDB DEFAULT CHARSET=utf8

    -> ;

Query OK, 0 rows affected (0.01 sec)

 

复制表的资料

mysql> insert into copy_tab01 select * from index_tab01;

Query OK, 4 rows affected (0.01 sec)

Records: 4  Duplicates: 0  Warnings: 0

 

 

mysql> select * from copy_tab01;

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

| id | col01  | col02         |

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

|  0 | Name01 | This is Test! |

|  0 | Name02 | This is Test! |

|  0 | Name03 | This is Test! |

|  0 | Name04 | This is Test! |

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

4 rows in set (0.00 sec)

 

mysql> select * from index_tab01;

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

| id | col01  | col02         |

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

|  0 | Name01 | This is Test! |

|  0 | Name02 | This is Test! |

|  0 | Name03 | This is Test! |

|  0 | Name04 | This is Test! |

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

4 rows in set (0.00 sec)

 

方式二，复制完整的表

mysql> create table copy_tab02 like index_tab01;

Query OK, 0 rows affected (0.00 sec)

 

mysql> show create table copy_tab02\G

*************************** 1. row ***************************

       Table: copy_tab02

Create Table: CREATE TABLE `copy_tab02` (

  `id` int(11) NOT NULL DEFAULT '0',

  `col01` varchar(10) NOT NULL DEFAULT '',

  `col02` text,

  UNIQUE KEY `index_un` (`col01`),

  KEY `indx_01` (`col01`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8

1 row in set (0.00 sec)

 

mysql> insert into copy_tab02 select * from index_tab01;

Query OK, 4 rows affected (0.00 sec)

Records: 4  Duplicates: 0  Warnings: 0

 

mysql> select * from copy_tab02;

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

| id | col01  | col02         |

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

|  0 | Name01 | This is Test! |

|  0 | Name02 | This is Test! |

|  0 | Name03 | This is Test! |

|  0 | Name04 | This is Test! |

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

4 rows in set (0.00 sec)