Which statement describes the significance of the CHANGE FAILURE command in RMAN？（） [" It is used to change failure priority only for HIGH or LOW priorities."," It is used to execute the advised repair script."," It is used to change failure priority only for the CRITICAL priority."," It is used to explicitly close the open failures."," It is used to inform the database about the repair after the repair script executes."]
按敷设方式分热力网最常见的为：管沟敷设、直埋敷设、（）。 ["顶管敷设","浅埋暗挖敷设","盾构敷设","架空敷设"]
You executed the following FLASHBACK TABLE command： FLASHBACK TABLE emp TO TIMESTAMP （’11：45’，’hh12：mi’）； Which two statements are correct？ （） [" The FLASHBACK TABLE statement will not be written to the alert log file."," The EMP table that was dropped by mistake from the database will be restored."," The changes made to the EMP table since the specified time will be undone."," The FLASHBACK TABLE statement will not maintain the existing indexes on the EMP table."," The FLASHBACK TABLE statement will be executed within a single transaction."," The list of transactions that have modified the EMP table since the specified time will be displayed."]
Examine the structure of the STUDENTS table: STUDENT_ID NUMBER NOT NULL, Primary Key STUDENT_NAME VARCHAR2(30) COURSE_ID VARCHAR2(10) NOT NULL MARKS NUMBER START_DATE DATE FINISH_DATE DATE You need to create a report of the 10 students who achieved the highest ranking in the course INT SQL and who completed the course in the year 1999. Which SQL statement accomplishes this task?（） [" SELECT student_ id, marks, ROWNUM "Rank" FROM students WHERE ROWNUM <= 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course_id = 'INT_SQL' ORDER BY marks DESC;"," SELECT student_id, marks, ROWID "Rank" FROM students WHERE ROWID <= 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course_id = 'INT_SQL' ORDER BY marks;"," SELECT student_id, marks, ROWNUM "Rank" FROM (SELECT student_id, marks FROM students WHERE ROWNUM <= 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course_id = 'INT_SQL' ORDER BY marks DESC);"," SELECT student_id, marks, ROWNUM "Rank" FROM (SELECT student_id, marks FROM students ORDER BY marks DESC) WHERE ROWNUM <= 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course _ id ='INT _ SQL'"]
You have three databases， FINDB， PAYDB and ADMINDB， located in Sydney， Tokyo and Singapore respectively. You want to perform administrative tasks which include starting up and shutting down the databases， creating and managing tablespaces and database users， and taking regular backups， for all of the three databases from London. Which component must be enabled and running on each host machine to achieve your objective？（） ["Oracle Management Agent","Enterprise Manager with Grid Control","Enterprise Manager with Database Control","Operating System Socket for incoming requests","Real Application Cluster （RAC） with three instances","Enterprise Manager with Generic Database Management"]
调用主窗体的（）方法，可以结束程序关闭窗体。
