HANA数据库备份与恢复：登录HANA数据库hdbsql-nhost-uSYSTEM-dSYSTEMDB执行BACKUPBACKUPDATAFORSYSTEMDBUSINGFILE('/usr/sap/ECD/HDB00/backup','COMPLETE_DATA_BACKUP666')BACKUPDATAFORECDUSINGFILE('/usr/sap/ECD/HDB00/backup',�