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Your multitenant container database (CDB) contains three pluggable database (PDBs). You find that the control file is damaged. You plan to use RMAN to recover the control file. There are no startup triggers associated with the PDBs.
Which three steps should you perform to recover the control file and make the database fully operational?（）

View the Exhibit and examine the structure of the ORDERS table. Which task would require subqueries？  （）  displaying the total order value for sales representatives 161 and 163。  displaying the order total for sales representative 161 in the year 1999。  displaying the number of orders that have order mode online and order date in 1999。  displaying the number of orders whose order total is more than the average order total for all online order。 垫片的作用是在其预定的使用寿命内，保持两个连接件的（） 连接。 密封。 连通。 可靠性。 “刺激→处理全过程（深介入）→反应”表示的顾客购买行为模式是（） 复杂的购买行为模式。 不协调减少的购买行为模式。 寻求多样化的购买行为模式。 常规或习惯性购买行为模式。 创建派生类时，可以通过NotInheritable创建不能作为基类的类。 Evaluate the set of SQL statements: CREATE TABLE dept (deptno NUMBER(2), dname VARCHAR2(14), loc VARCHAR2(13)); ROLLBACK; DESCRIBE DEPT What is true about the set?（） The DESCRIBE DEPT statement displays the structure of the DEPT table.。 The ROLLBACK statement frees the storage space occupied by the DEPT table.。 The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist.。 The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.。

Your multitenant container database (CDB) contains three pluggable database (PDBs). You find that the control file is damaged. You plan to use RMAN to recover the control file. There are no startup triggers associated with the PDBs.
Which three steps should you perform to recover the control file and make the database fully operational?（）