sql查询与修改数据库逻辑文件名,移动数据库存储路径

时间:2021-11-17 22:28:08
USE mydb

GO

--1.查询当前数据库的逻辑文件名

SELECT FILE_NAME(1) AS 'File Name 1', FILE_NAME(2) AS 'File Name 2';

--或通过以下语句查询:

--SELECT name FROM sys.database_files 

/*

File Name 1         File Name 2

------------------- --------------------

mydb                mydb_log

(1 行受影响)

*/

--2.修改数据文件或日志文件的逻辑名称

ALTER DATABASE [mydb]

MODIFY FILE ( NAME = mydb, NEWNAME = new_mydb ) 

ALTER DATABASE [mydb]

MODIFY FILE ( NAME = mydb_log, NEWNAME = new_mydb_log ) 

--查询更改后的名称:

SELECT FILE_NAME(1) AS 'File Name 1', FILE_NAME(2) AS 'File Name 2';

/*

File Name 1         File Name 2

------------------- --------------------

new_mydb            new_mydb_log

(1 行受影响)

*/

--3.若要将数据文件或日志文件移至新位置,先OFFLINE把文件MOVE到相应的位置,然后再ONLINE

--  详细参考以下步骤

--3.1 查询数据文件或日志文件当前存放路径:

SELECT physical_name FROM sys.database_files 

/*

physical_name

-------------------------------------------------------------------------------------------

D:/Program Files/Microsoft SQL Server/MSSQL10.MSSQLSERVER/MSSQL/DATA/mydb.mdf

D:/Program Files/Microsoft SQL Server/MSSQL10.MSSQLSERVER/MSSQL/DATA/mydb_log.ldf

(2 行受影响)

*/

--3.2 移动路径

USE [master]

GO

--3.2.1 关闭所有进程

DECLARE @str VARCHAR(500);

SET @str = '';

SELECT @str = @str + 'KILL '+RTRIM(spid)+';'+CHAR(13)+CHAR(10)

FROM master.dbo.sysprocesses

WHERE dbid=DB_ID('mydb');

EXEC(@str);

GO

--3.2.2 设置数据库脱机

ALTER DATABASE [mydb] SET  OFFLINE

GO

--3.2.3 移动数据文件与日志文件(为确保数据安全,建议改move为copy,复制成功后再删除源文件)

EXEC master..xp_cmdshell 'move "D:/Program Files/Microsoft SQL Server/MSSQL10.MSSQLSERVER/MSSQL/DATA/mydb.mdf" "E:/DBTEST"',NO_OUTPUT

EXEC master..xp_cmdshell 'move "D:/Program Files/Microsoft SQL Server/MSSQL10.MSSQLSERVER/MSSQL/DATA/mydb_log.LDF" "E:/DBTEST"',NO_OUTPUT

GO

--3.2.4 设置新的存储路径

ALTER DATABASE [mydb] MODIFY FILE (NAME = new_mydb,FILENAME = 'E:/DBTEST/mydb.mdf')

ALTER DATABASE [mydb] MODIFY FILE (NAME = new_mydb_log,FILENAME = 'E:/DBTEST/mydb_log.ldf')

GO

--3.2.5 设置数据库联机

ALTER DATABASE [mydb] SET ONLINE

GO

--3.2.6 查询新的路径

USE mydb

GO

SELECT physical_name FROM sys.database_files 

/*

physical_name

------------------------------

E:/DBTEST/mydb.mdf

E:/DBTEST/mydb_log.ldf

(2 行受影响)

*/