You have lost datafile 4 from your database. Which is typically the fastest way to restore your database? （） ["Restore and recover the datafile. ","Restore and recover the tablespace. ","Restore and recover the database. ","Restore and recover the control file. ","Restore and recover the parameter file."]
公园
Which two statements are true about encrypting RMAN backup?（） (Choose two.) [" The transparent encryption of backups uses the encryption wallet"," The database uses the same encryption key for every encrypted backup"," The password encryption of backups only uses the password while creating and restoring backup"," If transparent encryption is configured, you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups."]
You have joined a new organization as a Database Administrator. The Security Administrator in your organization has kept human errors， such as erroneously dropping users， tables， and important data， to a minimum by carefully granting only the necessary privileges to each user. As a result of several ongoing transactions within your database， you discover that the flashback logs are rapidly increasing in the flash recovery area. To avoid out-of-space errors， you decide to delete the flashback logs from the flash recovery area. How can you delete the flashback logs from the database if your database is up and running？（） [" Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement."," Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement while the database is up and running."," Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command. Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement."," Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement."]
关节松动术主要用于（）和（）关节活动范围，以利患者完成功能性活动；关节松动技术将操作时手法分为（）级。
垄断的基本类型有哪些？
