轉載：https://blog.csdn.net/zengcong2013/article/details/50354546/

修改系統資料庫SQL

 
alter database master modify file ( name = master, filename ='C:\Program Files (x86)\Microsoft SQL Server\MSSQL.1\MSSQL\Data1\master.mdf');
alter database master modify file ( name = mastlog, filename ='C:\Program Files (x86)\Microsoft SQL Server\MSSQL.1\MSSQL\Data1\mastlog.ldf');

alter database model modify file ( name = modeldev, filename ='C:\Program Files (x86)\Microsoft SQL Server\MSSQL.1\MSSQL\Data1\model.mdf');
alter database model modify file ( name = modellog, filename ='C:\Program Files (x86)\Microsoft SQL Server\MSSQL.1\MSSQL\Data1\modellog.ldf');
 
alter database msdb modify file ( name = MSDBData, filename ='C:\Program Files (x86)\Microsoft SQL Server\MSSQL.1\MSSQL\Data1\MSDBData.mdf');
alter database msdb modify file ( name = MSDBLog, filename ='C:\Program Files (x86)\Microsoft SQL Server\MSSQL.1\MSSQL\Data1\MSDBLog.ldf');
  
alter database tempdb modify file ( name = tempdev, filename ='C:\Program Files (x86)\Microsoft SQL Server\MSSQL.1\MSSQL\Data1\tempdb.mdf');
alter database tempdb modify file ( name = templog, filename ='C:\Program Files (x86)\Microsoft SQL Server\MSSQL.1\MSSQL\Data1\templog.ldf');