mssql恢复
restore database a from disk='b.bak' with file=1, nounload,replace, stats=10
with move 'a' to 'C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\a.mdf',
move 'a_log' to 'C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\a_log.LDF'