USE [master]
GO
 
 DECLARE @Reg_Key NVARCHAR(40) = N'HKEY_LOCAL_MACHINE'
 DECLARE @Reg_Soft_Path NVARCHAR(100) = N'Software\Microsoft\MSSQLServer\MSSQLServer'


-- 更改数据文件的默认位置
EXEC   xp_instance_regwrite
       @Reg_Key,
       @Reg_Soft_Path,
       N'DefaultData',
       REG_SZ,
       N'E:\MSSQL\Data'

 
-- 更改日志文件的默认位置
EXEC   xp_instance_regwrite
       @Reg_Key,
       @Reg_Soft_Path,
       N'DefaultLog',
       REG_SZ,
       N'E:\MSSQL\Log'

 
-- 更改备份的默认位置
EXEC   xp_instance_regwrite
       @Reg_Key,
       @Reg_Soft_Path,
       N'BackupDirectory',
       REG_SZ,
       N'E:\MSSQL\Backup'
GO