Anexando um arquivo MDF sem arquivo LDF

CREATE DATABASE AdventureWorks2012 
ON (FILENAME = N'C:\ProgramData\Homefront\Database\DB1.mdf')
FOR ATTACH_REBUILD_LOG
GO

CREATE DATABASE AdventureWorks2012 
ON  ON (FILENAME = N'C:\ProgramData\Homefront\Database\DB1.mdf')
FOR ATTACH
GO