Home Database Mysql Tutorial SQLSERVER数据库备份后无法还原的解决办法

SQLSERVER数据库备份后无法还原的解决办法

Jun 07, 2016 pm 04:19 PM
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有时候完全备份, 当还原的时候说不时数据库文件不让还原, 解决办法: 可以直接复制数据库文件, xxx.mdf 和 xxx.ldf (实际复制过程中需要先停止sqlserver服务才可以) 用 sp_attach_db 存储过程 就能搞定. 示例 下面的示例将 pubs 中的两个文件附加到当前服务

有时候完全备份, 当还原的时候说不时数据库文件不让还原, 解决办法:
可以直接复制数据库文件, xxx.mdf 和 xxx.ldf (实际复制过程中需要先停止sqlserver服务才可以)

用 sp_attach_db 存储过程 就能搞定.

示例
下面的示例将 pubs 中的两个文件附加到当前服务器。

EXEC sp_attach_db @dbname = N'pubs',
@filename1 = N'c:Program FilesMicrosoft SQL ServerMSSQLDatapubs.mdf',
@filename2 = N'c:Program FilesMicrosoft SQL ServerMSSQLDatapubs_log.ldf'


N 表示Unicode的含义,就象类型中有varchar和nvarchar一样,一个Unicode字符占两个字节.使用N'的情况主要是在双字节系统环 境中强制系统对每个字符用Unicode标准来解释,否则如果你的数据库.mdf文件是中文名而又不加N'的话,数据库加载后名称可能就变成乱码,因为系 统按单字节处理字符造成!


............................................................


如果确认是SQL SERVER无法启动,请按照下面步骤操作:
1.重装SQL SERVER(注意要保留原来数据库的数据库文件,日志文件可不要)
2.在SQL Analysis中用sp_attach_db将数据库加到服务器

sp_attach_db用法:
sp_attach_db
将数据库附加到服务器。

语法
sp_attach_db [ @dbname = ] 'dbname'
, [ @filename1 = ] 'filename_n' [ ,...16 ]

参数
[@dbname =] 'dbname'

要附加到服务器的数据库的名称。该名称必须是唯一的。dbname 的数据类型为 sysname,,默认值为 NULL。

[@filename1 =] 'filename_n'

数 据库文件的物理名称,包括路径。filename_n 的数据类型为 nvarchar(260),默认值为 NULL。最多可以指定 16 个文件名。参数名称以 @filename1 开始,递增到 @filename16。文件名列表至少必须包括主文件,主文件包含指向数据库中其它文件的系统表。该列表还必须包括数据库分离后所有被移动的文件。

返回代码值
0(成功)或 1(失败)

结果集


注释
只应对以前使用显式 sp_detach_db 操作从数据库服务器分离的数据库执行 sp_attach_db。如果必须指定多于 16 个文件,请使用带有 FOR ATTACH 子句的 CREATE DATABASE。

如果将数据库附加到的服务器不是该数据库从中分离的服务器,并且启用了分离的数据库以进行复制,则应该运行 sp_removedbreplication 从数据库删除复制。

权限
只有 sysadmin 和 dbcreator 固定服务器角色的成员才能执行本过程。

 

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