1、BACKUP DATABASE your_database TO DISK = 'diff.bak'with DIFFERENTIAL #差异备份，仅备份数据
２、BACKUP DATABASE your_database TO DISK = 'full.bak'＃完全备份，仅备份数据
３、DUMP DATABASE your_database TO DISK = 'diff.bak'with DIFFERENTIAL#差异备份，备份数据库结构及数据
４、dump DATABASE your_database TO DISK = 'full.bak'＃完全备份，备份数据库结构及数据