You are maintaining the database in Oracle10g. You are performing an incomplete recovery by using RMAN because an important table， EMPLOYEE， is dropped and purged from the Recycle Bin. Which statement is NOT true regarding an incomplete recovery？（） The target database must be in the MOUNT mode to ensure restoration of the datafiles.。 You can restore the datafiles from the backup by using the RMAN utility only if the backups were taken using the RMAN utility.。 The control file must be recreated.。 The database must be opened with the RESETLOGS option.。
患者，男性，30岁。学习游泳不慎误人深水区溺水，经抢救出水，发现心跳、呼吸已停。对该患者判断及评价呼吸的时间不得超过（） 5s。 6s。 8s。 10s。 15。
Examine the following command that is used to duplicate a database on the same host: RMAN> RUN { ALLOCATE AUXILIARY CHANNEL, aux 1 DEVICE TYPE DISK; DUPLICATE TARGET DATABASE TO auxdb SKIP READONLY; \ } Which two statements describe the effect after the database is duplicated successfully? （）(Choose two) The data files of the read-only tablespaces in the target database are not duplicated。 The read-only tablespaces in the target database are still defined in new the database。 The read-only tablespaces in the target database are changed to online after duplication。 The data files of the read-only tablespaces in the target database get duplicated。 The read-only tablespaces in the target database are not defined in the new database。
Your database is running in ARCHIVELOG mode. You are performing a user-managed backup of the DATA1 tablespace. You place the DATA1 tablespace in backup mode by issuing the following statement： ALTER TABLESPACE data1 BEGIN BACKUP； While you are performing the backup， an error occurs that causes the instance to terminate abnormally. Which statement about the DATA1 tablespace is true？（） The DATA1 tablespace is automatically taken out of backup mode when the instance aborts.。 If you restart the database，the DATA1 tablespace will be automatically taken out of backup mode when the database is opened.。 If you restart the database，the DATA1 tablespace will be automatically taken out of backup mode when the database is mounted.。 If you restart the database，the database will not be opened.。
废水处理中变异现象有哪几方面？
You issued the following statement： SQL> ALTER DATABASE BACKUP CONTROLFILE TO TRACE； What will be the result of issuing the statement？（）
