MySQL8数据迁移大表捷径【表空间迁移】

0. 目标端必须有同名表，没有则建一个空表；

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1、 源端文件准备

源端： 

flush tables t for export; 

复制 

t.ibd, t.cfg到目标端。 

###############################

flush tables tt7   for export; 

cp  tt7*   ../ops

2、 目标端存在同样的表则丢弃原来的数据文件

目标端： 

alter table tt7  discard tablespace;

3、 目标端加载新的数据文件 t.ibd

alter table tt7 import tablespace; 

4、源端释放锁

源端： 

unlock tables; 

过程中主要异常处理：

#####################################################

SELECT  * FROM   ops2.tt7    ;

SELECT  * FROM   ops.tt7    ;

import tablespace报错：

mysql alter table tt7 import tablespace; 

ERROR 1812 (HY000): Tablespace is missing for table ops.tt7.

确认再相应的目录存在两个文件

确认属主和权限

#####################################################

过程

[root@qaserver120 ops]# ll

total 80

drwxr-xr-x 2 root  root      36 Dec  2 21:42 000

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt2.ibd

[root@qaserver120 ops]# 

[root@qaserver120 ops]# 

[root@qaserver120 ops]# 

[root@qaserver120 ops]# cp 000

[root@qaserver120 ops]# ll

drwxr-xr-x 2 root  root      36 Dec  2 21:42 000

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt2.ibd

-rw-r----- 1 root  root     627 Dec  2 21:45 tt7.cfg

-rw-r----- 1 root  root  114688 Dec  2 21:45 tt7.ibd

[root@qaserver120 ops]# chown mysql.mysql tt7*

[root@qaserver120 ops]# 

[root@qaserver120 ops]# ll

drwxr-xr-x 2 root  root      36 Dec  2 21:42 000

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt2.ibd

-rw-r----- 1 mysql mysql    627 Dec  2 21:45 tt7.cfg

-rw-r----- 1 mysql mysql 114688 Dec  2 21:46 tt7.ibd

[root@qaserver120 ops]# 

#####################################################

mysql show tables;

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

| Tables_in_ops |

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

| tt2           |

| tt7           |

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

2 rows in set (0.00 sec)

mysql select * from tt7;

ERROR 1814 (HY000): Tablespace has been discarded for table 'tt7'

mysql alter table tt7 import tablespace; 

ERROR 1812 (HY000): Tablespace is missing for table ops.tt7.

mysql 

mysql alter table tt7 import tablespace;

Query OK, 0 rows affected (0.08 sec)

mysql 

mysql select * from tt7;

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

| x            | y    |

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

| BBBBBB       | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

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

7 rows in set (0.00 sec)

mysql

###############################################

################################################

mysql mysql show tables;

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

| Tables_in_ops2 |

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

| tt2            |

| tt3            |

| tt7            |

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

3 rows in set (0.00 sec)

mysql 

mysql use ops

Database changed

mysql show tables;

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

| Tables_in_ops |

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

| tt2           |

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

1 row in set (0.00 sec)

mysql 

mysql use ops2;

Database changed

mysql select * from tt7;

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

| x      | y    |

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

| BBBBBB | NULL |

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

1 row in set (0.00 sec)

mysql 

mysql 

mysql insert into tt7 select * from tt3;

Query OK, 3 rows affected (0.00 sec)

Records: 3  Duplicates: 0  Warnings: 0

mysql insert into tt7 select * from tt3;

Query OK, 3 rows affected (0.00 sec)

Records: 3  Duplicates: 0  Warnings: 0

mysql select * from tt7;

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

| x            | y    |

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

| BBBBBB       | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

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

7 rows in set (0.00 sec)

mysql 

mysql commit;

Query OK, 0 rows affected (0.00 sec)

mysql 

mysql exit

Bye

[root@qaserver120 pkg]# cd /data/mysql/ops2

[root@qaserver120 ops2]# ll

total 240

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt2.ibd

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt3.ibd

-rw-r----- 1 mysql mysql 114688 Dec  2 21:36 tt7.ibd

[root@qaserver120 ops2]# 

[root@qaserver120 ops2]# 

[root@qaserver120 ops2]# 

[root@qaserver120 ops2]# mysql -u'root'  -p'fgxkB9;Zq40^MFQUi$PJ'        -A

mysql: [Warning] Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 56

Server version: 8.0.18 MySQL Community Server - GPL

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql use ops2

Database changed

mysql 

mysql flush tables tt7   for export; 

Query OK, 0 rows affected (0.00 sec)

mysql show tables;

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

| Tables_in_ops2 |

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

| tt2            |

| tt3            |

| tt7            |

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

3 rows in set (0.01 sec)

mysql exit

Bye

[root@qaserver120 ops2]# ll

total 240

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt2.ibd

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt3.ibd

-rw-r----- 1 mysql mysql 114688 Dec  2 21:36 tt7.ibd

[root@qaserver120 ops2]# ll

total 240

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt2.ibd

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt3.ibd

-rw-r----- 1 mysql mysql 114688 Dec  2 21:36 tt7.ibd

[root@qaserver120 ops2]# pwd

/data/mysql/ops2

[root@qaserver120 ops2]# cd  cd /data/mysql 

-bash: cd: cd: No such file or directory

[root@qaserver120 ops2]#  cd /data/mysql/ops2

[root@qaserver120 ops2]# ll

total 240

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt2.ibd

-rw-r----- 1 mysql mysql 114688 Dec  2 21:17 tt3.ibd

-rw-r----- 1 mysql mysql 114688 Dec  2 21:36 tt7.ibd

[root@qaserver120 ops2]# ll -al

total 244

drwxr-x---  2 mysql mysql     51 Dec  2 21:38 .

drwxr-xr-x 12 mysql mysql   4096 Dec  2 21:17 ..

-rw-r-----  1 mysql mysql 114688 Dec  2 21:17 tt2.ibd

-rw-r-----  1 mysql mysql 114688 Dec  2 21:17 tt3.ibd

-rw-r-----  1 mysql mysql 114688 Dec  2 21:36 tt7.ibd

[root@qaserver120 ops2]# pwd

/data/mysql/ops2

[root@qaserver120 ops2]# mysql -u'root'  -p'fgxkB9;Zq40^MFQUi$PJ'        -A

mysql: [Warning] Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 57

Server version: 8.0.18 MySQL Community Server - GPL

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql use ops2

Database changed

mysql show tables;

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

| Tables_in_ops2 |

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

| tt2            |

| tt3            |

| tt7            |

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

3 rows in set (0.00 sec)

mysql select * from tt7;

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

| x            | y    |

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

| BBBBBB       | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

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

7 rows in set (0.00 sec)

mysql flush tables tt7   for export; 

Query OK, 0 rows affected (0.00 sec)

mysql use ops

Database changed

mysql ll

- ;

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'll' at line 1

mysql show tables;

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

| Tables_in_ops |

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

| tt2           |

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

1 row in set (0.00 sec)

mysql 

mysql 

mysql alter table tt7 import tablespace; 

ERROR 1100 (HY000): Table 'tt7' was not locked with LOCK TABLES

mysql 

mysql 

mysql use ops2

Database changed

mysql show tables;

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

| Tables_in_ops2 |

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

| tt2            |

| tt3            |

| tt7            |

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

3 rows in set (0.00 sec)

mysql select * from tt7;

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

| x            | y    |

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

| BBBBBB       | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

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

7 rows in set (0.00 sec)

mysql unlock tables;

Query OK, 0 rows affected (0.00 sec)

mysql show create table  tt7;

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

| Table | Create Table                                                                                                                                                                                         |

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

| tt7   | CREATE TABLE `tt7` (

`x` varchar(200) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_as_cs DEFAULT NULL,

`y` int(11) DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_as_cs |

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

1 row in set (0.00 sec)

mysql use ops

Database changed

mysql show tables;

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

| Tables_in_ops |

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

| tt2           |

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

1 row in set (0.01 sec)

mysql  CREATE TABLE `tt7` (

-   `x` varchar(200) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_as_cs DEFAULT NULL,

-   `y` int(11) DEFAULT NULL

- ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_as_cs ;

Query OK, 0 rows affected, 1 warning (0.02 sec)

mysql 

mysql 

mysql show tables;

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

| Tables_in_ops |

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

| tt2           |

| tt7           |

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

2 rows in set (0.00 sec)

mysql select * from tt7;

Empty set (0.00 sec)

mysql 

mysql alter table tt7  discard tablesapce; 

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'tablesapce' at line 1

mysql alter table tt7  discard tablespace;

Query OK, 0 rows affected (0.03 sec)

mysql 

mysql 

mysql show tables;

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

| Tables_in_ops |

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

| tt2           |

| tt7           |

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

2 rows in set (0.00 sec)

mysql select * from tt7;

ERROR 1814 (HY000): Tablespace has been discarded for table 'tt7'

mysql 

mysql 

mysql 

mysql show tables;

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

| Tables_in_ops |

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

| tt2           |

| tt7           |

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

2 rows in set (0.00 sec)

mysql select * from tt7;

ERROR 1814 (HY000): Tablespace has been discarded for table 'tt7'

mysql 

mysql 

mysql alter table tt7 import tablespace; 

ERROR 1812 (HY000): Tablespace is missing for table `ops`.`tt7`.

mysql 

mysql 

mysql 

mysql alter table tt7 import tablespace;

Query OK, 0 rows affected (0.08 sec)

mysql 

mysql 

mysql select * from tt7;

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

| x            | y    |

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

| BBBBBB       | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

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

7 rows in set (0.00 sec)

mysql SELECT  * FROM   ops2.tt7    ;

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

| x            | y    |

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

| BBBBBB       | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

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

7 rows in set (0.00 sec)

mysql SELECT  * FROM   ops.tt7    ;

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

| x            | y    |

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

| BBBBBB       | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

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

7 rows in set (0.00 sec)

mysql 

mysql 

mysql 

mysql unlock tables; 

Query OK, 0 rows affected (0.00 sec)

mysql unlock tables; 

Query OK, 0 rows affected (0.00 sec)

mysql use ops

Database changed

mysql show tables;

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

| Tables_in_ops |

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

| tt2           |

| tt7           |

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

2 rows in set (0.00 sec)

mysql 

mysql 

mysql 

mysql use ops2;

Database changed

mysql 

mysql 

mysql show tables;

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

| Tables_in_ops2 |

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

| tt2            |

| tt3            |

| tt7            |

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

3 rows in set (0.01 sec)

mysql 

mysql select * from tt7;

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

| x            | y    |

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

| BBBBBB       | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

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

7 rows in set (0.00 sec)

mysql 

mysql use ops;

Database changed

mysql 

mysql 

mysql select * from tt7;

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

| x            | y    |

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

| BBBBBB       | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

| AAAAAA       | NULL |

| BBBBBB       | NULL |

| 555555555555 | NULL |

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

7 rows in set (0.00 sec)

怎么把mysql数据库里面的表及数据 复制到oracle

1、可以用PB、PLSQL Developer等软件，把表的数据倒成SQL文件，在MySql中执行！

2、也可以尝试写数据迁移程序，大概步骤是这样：

1）、根据双方数据库的数据字典，罗列出需要的字段

2）、编写相应的迁移程序，主要注意的地方就是Oracle的数据类型要做相应的转换，转移成DB2里有的，删除倒出时一些无用的数据，使导入的数据具有意义！

3）、抽取数据做验证！

3、如果数据量不大的话，完成可以用把表的数据倒成SQL文件再执行！

mysql怎么把表转移到另外一个数据库

可以在另外一个数据库中先创建相同的数据库结构，然后再将数据库内容复制到另一个数据库中即可。

mysql5.1的数据库如何迁移至mysql5.7？

安全的办法是在旧环境导出表数、在新环境建立数据库后导入表，可以使用SQL或者TXT为中间文件。

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