（FILENAME = N'C：\\Program Files \\\ \\ _Microsoft SQL Server \\MSSQL10_50.SQLEXPRESS \\MSSQL \\DATA \\ MyNewDb.ldf'）



查看两者的扩展名第一项是mdf而另一项是ldf

( FILENAME = N'C:\\Program Files\\Microsoft SQL Server\\MSSQL10_50.SQLEXPRESS\\MSSQL\\DATA\\MyNewDb.ldf' )

Check Extensions of both items one is mdf and other is ldf