新建HYGC_new，直接執行如下sql語句即可，原理即為將HYGC.bak直接還原到文件mdf與ldf中
//HYGC.bak為備份過來的文件；HYGC_new為新建的數據庫
RESTORE FILELISTONLY FROM DISK = N'E:\nbdatabase\HYGC.bak'
RESTORE DATABASE HYGC_new
FROM DISK = 'E:\nbdatabase\HYGC.bak'
WITH MOVE 'HYGC' TO 'E:\software\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\HYGC_new.mdf',
MOVE 'HYGC_log' TO 'E:\software\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\HYGC_new_log.ldf'