On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30am. Which option must you use to check whether a flashback operation can recover the database to the specified time?() Check the alert log file。 Query the V$FLASHBACK_DATABASE_LOG view。 Query the V$RECOVERY_FILE_DEST_SIZE view。 Query the V$FLASHBACK_DATABASE_STAT view。 Check the value assigned for the UNDO_RETENTION parameter。
认知发展理论认为,儿童使用他已经获得的图式或技能从事并完成活动,这个过程是() 同化。 顺应。 平衡。 协调。
You executed the following PL/SQL block successfully: VARIABLE tname VARCHAR2(20) BEGIN dbms_addm.insert_finding_directive (NULL, DIR_NAME=>’Detail CPU Usage’, FINDING_NAME=>’CPU Usage’, MIN_ACTIVE_SESSIONS=>0, MIN_PERC_IMPACT=>90); :tname := ’database ADDM task4’; dbms_addm.analyze_db(:tname, 150, 162); END; / Then you executed the following command: SQL> SELECT dbms_addm.get_report(:tname) FROM DUAL; The above command produces Automatic Database Diagnostic Monitor (ADDM) analysis() with the CPU Usage finding if it is less than 90。 without the CPU Usage finding if it is less than 90。 with the CPU Usage finding for snapshots below 90。 with the CPU Usage finding for snapshots not between 150 and 162。
You are using Recovery wizard for performing incomplete recovery. Which of the following object types is NOT available in the Perform Recovery :Type screen?() Whole database。 Tablespaces。 Datafiles。 Archive logs。 Redo log。
偏移特性阻抗继电器可否作为第Ⅰ段的测量元件()。 可以。 不可以。 无所谓。
组织内部招聘的缺点有()