【说站】mysql如何对数据库进行恢复

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发布于 2022-11-23 08:11:16

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mysql如何对数据库进行恢复

1、备份文件中只包含表的备份，不包含库的语句时，导入时必须指定库名，目标库必须存在。

可以从备份文件mysql-user.sql引入test库。

[root@localhost ~]# mysql -u root -p test < mysql-user.sql
Enter password:
[root@localhost ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 17
Server version: 5.5.22-log Source distribution
 
Copyright (c) 2000, 2011, 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 test;                                   ## 验证导入结果
Database changed
mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| user           |
+----------------+
1 row in set (0.00 sec)
 
mysql>

2、如果备份文件包含完整的库信息，则在进行导入操作时不需要指定库名，可以从备份文件auth.sql恢复auth库。

[root@localhost ~]# cd /usr/local/mysql/data/
[root@localhost data]# ls
auth     ib_logfile0  localhost.err  mongodb  mysql-bin.000001  mysql-bin.000003  mysql-bin.index  performance_schema
ibdata1  ib_logfile1  localhost.pid  mysql    mysql-bin.000002  mysql-bin.000004  mysql.error.log  test
[root@localhost data]# mv auth /tmp/                           ## 移动 auth 库，进行模拟故障操作。
[root@localhost data]# ls -ld auth
ls: 无法访问auth: 没有那个文件或目录
[root@localhost data]# mysql -u root -p < ~/auth.sql           ## 执行导入恢复操作。
Enter password:
ERROR 1050 (42S01) at line 63: Table '`auth`.`users`' already exists
[root@localhost data]# ls -ld auth                             ## 确认恢复后的结果。
drwx------. 2 mysql mysql 4096 8月   1 05:17 auth
[root@localhost data]#