以下仅为参照，如果有多个实例，可能会有些许不同：
本环境是SQL Server 2005 Standard Version 64-bit 和 SQL Server 2008 Standard Version 64-bit 双实例同时安装在一个
Windows Server 2008 Standard Version 64-bit OS上：
代码
复制代码 代码如下:
Windows Server 2008 Standard Version 64-bit
SQL Server 2005 Standard Version 64-bit
查询用户库Data文件默认路径：
DECLARE @DefaultData VARCHAR(100)
EXEC master..xp_regread @rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL.1/MSSQLServer',
@value_name='DefaultData',
@DefaultData=@DefaultData OUTPUT
SELECT @DefaultData
查询用户库Log文件默认路径：
DECLARE @DefaultLog VARCHAR(100)
EXEC master..xp_regread @rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL.1/MSSQLServer',
@value_name='DefaultLog',
@DefaultLog=@DefaultLog OUTPUT
SELECT @DefaultLog
查询用户库备份文件默认路径：
DECLARE @BackupDirectory VARCHAR(100)
EXEC master..xp_regread @rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL.1/MSSQLServer',
@value_name='BackupDirectory',
@BackupDirectory=@BackupDirectory OUTPUT
SELECT @BackupDirectory
修改用户库Data文件默认路径：
EXEC master..xp_regwrite
@rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL.1/MSSQLServer',
@value_name='DefaultData',
@type='REG_SZ',
@value='D:/SQL2005/Data'
修改用户库Log文件默认路径：
EXEC master..xp_regwrite
@rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL.1/MSSQLServer',
@value_name='DefaultLog',
@type='REG_SZ',
@value='D:/SQL2005/Log'
修改用户库备份文件默认路径：
EXEC master..xp_regwrite
@rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL.1/MSSQLServer',
@value_name='BackupDirectory',
@type='REG_SZ',
@value='D:/SQL2005/DBBak'
复制代码 代码如下:
Windows Server 2008 Standard Version 64-bit
SQL Server 2008 Standard Version 64-bit
查询用户库Data文件默认路径：
DECLARE @DefaultData VARCHAR(100)
EXEC master..xp_regread @rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL10.SQL2008/MSSQLServer',
@value_name='DefaultData',
@DefaultData=@DefaultData OUTPUT
SELECT @DefaultData
查询用户库Log文件默认路径：
DECLARE @DefaultLog VARCHAR(100)
EXEC master..xp_regread @rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL10.SQL2008/MSSQLServer',
@value_name='DefaultLog',
@DefaultLog=@DefaultLog OUTPUT
SELECT @DefaultLog
查询用户库备份文件默认路径：
DECLARE @BackupDirectory VARCHAR(100)
EXEC master..xp_regread @rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL10.SQL2008/MSSQLServer',
@value_name='BackupDirectory',
@BackupDirectory=@BackupDirectory OUTPUT
SELECT @BackupDirectory
修改用户库Data文件默认路径：
EXEC master..xp_regwrite
@rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL10.SQL2008/MSSQLServer',
@value_name='DefaultData',
@type='REG_SZ',
@value='D:/SQL2008/Data'
修改用户库Log文件默认路径：
EXEC master..xp_regwrite
@rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL10.SQL2008/MSSQLServer',
@value_name='DefaultLog',
@type='REG_SZ',
@value='D:/SQL2008/Log'
修改用户库备份文件默认路径：
EXEC master..xp_regwrite
@rootkey='HKEY_LOCAL_MACHINE',
@key='Software/Microsoft/Microsoft SQL Server/MSSQL10.SQL2008/MSSQLServer',
@value_name='BackupDirectory',
@type='REG_SZ',
@value='D:/SQL2008/DBBak'
