单选题You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also have a table named MY_TABLE in your schema. You execute the following statement: FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2; What will be the

题目
单选题
You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also have a table named MY_TABLE in your schema. You execute the following statement: FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2; What will be the result of executing this statement?()
A

One of the tables is recovered from the Recycle Bin using a First In First Out (FIFO) approach.

B

One of the tables is recovered from the Recycle Bin using a Last In First Out (LIFO) approach.

C

Both the tables are recovered from the Recycle Bin with one table renamed to MY_TABLE2 and the other to a system-generated name.

D

None of the tables are recovered from the Recycle Bin, and the statement returns an error.

参考答案和解析
正确答案: A
解析: 暂无解析
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相似问题和答案

第1题:

Examine the output of the query that you executed to list the objects in the recycle bin:You verified that no table named SALES_TAB exists in the schema. Then you executed the following command to purge the objects in the recycle bin:SQL> PURGE TABLE sales_tab;What would be the outcome of this command?()

A. All three tables in the recycle bin are purged

B. Only the table with the oldest DROPSCN is purged

C. The command returns an error because multiple entries with the same name exist in the recycle bin

D. Only the table with the latest DROPSCN is purged


参考答案:B

第2题:

Your Oracle Database 10g is online when you execute the following statement:        SQL>ALTER TABLESPACE MY_TABLESPACE FLASHBACK OFF;   What is the result of executing this statement if the Flashback Database feature is already enabled in the database?()

  • A、 The database does not record flashback logs for MY_TABLESPACE
  • B、 The tables residing in MY_TABLESPACE are not protected by the Recycle Bin.
  • C、 All the tablespaces except MY_TABLESPACE can be recovered using Flashback Database feature.
  • D、 None of the flashback technologies, such as Flashback Table, Flashback Transaction Query and Flashback Version Query can be used to recover individual rows within the objects from MY_TABLESPACE

正确答案:A

第3题:

You executed the following commands in a database session:What could have caused the recycle bin to clean up?()

A. There is demand for space from the new table从

B. The undo tablespace does not have sufficient free space

C. The new table name is the same as the table name in the recycle bin

D. The temporary tablespace that is assigned to you does not have sufficient free space


参考答案:A

第4题:

You issued the following command:        SQL> DROP TABLE MYTABLE;        SQL> SHOW RECYCLEBIN  The following output is returned:        ORIGINAL NAME RECYCLEBIN NAME               OBJECT TYPE      DROP TIME        ------------- ------------------------------ --------------- --------------------        MYTABLE BIN$04LhcpndanfgMAAAAAANPw==$0     TABLE           2005-01-13:20:11:31  You want to drop the table, MYTABLE, from the Recycle Bin. Which two commands can you issue to accomplish the desired task?()

  • A、 DROP TABLE MYTABLE PURGE;
  • B、 PURGE RECYCLEBIN;
  • C、 PURGE TABLE MYTABLE;
  • D、 PURGE TABLE BIN$04LhcpndanfgMAAAAAANPw==$0;

正确答案:C,D

第5题:

You are performing flashback of the EMPLOYEE table in SCOTT’s schema because some incorrect data was inserted into the table and committed by mistake. Which two clauses will you use in the FLASHBACK TABLE statement for using the Flashback Table feature? ()

  • A、 RESETLOGS
  • B、 TO TIMESTAMP
  • C、 TO BEFORE DROP
  • D、 RENAME TO
  • E、 TO SCN

正确答案:B,E

第6题:

You plan to use Flashback Drop feature to recover a dropped table SALES_EMP. No other table with the same name exists in the schema.You query RECYCLEBIN and find multiple entries for the SALES_EMP table as follows, You then issue the following statement to recover the table:SQL> FLASHBACK TABLE sales_emp TO BEFORE DROP;What would be the outcome of the precedent statement?()

A. It retrieves the latest version of the table from the recycle bin

B. It retrieves the oldest version of the table from the recycle bin

C. It retrieves the version of the table for which undo information is available

D. It returns an error because the table name is not specified as per the names in the OBJECT_NAME column


参考答案:A

第7题:

On Monday, you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday, you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct?()

  • A、 You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.
  • B、 You can restore the DEPT table by using the Oracle Flashback Drop feature, provided you use the RENAME TO clause.
  • C、 You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.
  • D、 You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.

正确答案:B

第8题:

Before a Flashback Table operation, you execute the following command:ALTER TABLE employees ENABLE ROW MOVEMENT;Why would you need this to be executed?()

A. Because row IDs may change during the flashback operation

B. Because the object number changes after the flashback operation

C. Because the rows are retrieved from the recycle bin during the flashback operation

D. Because the table is moved forward and back to a temporary during the flashback opertion


参考答案:A

第9题:

Before a Flashback Table operation, you execute the following command: ALTER TABLE employees ENABLE ROW MOVEMENT; Why would you need this to be executed?()

  • A、Because row IDs may change during the flashback operation
  • B、Because the object number changes after the flashback operation
  • C、Because the rows are retrieved from the recycle bin during the flashback operation
  • D、Because the table is moved forward and back to a temporary during the flashback opertion

正确答案:A

第10题:

You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also have a table named MY_TABLE in your schema. You execute the following statement: FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2; What will be the result of executing this statement?()

  • A、One of the tables is recovered from the Recycle Bin using a First In First Out (FIFO) approach.
  • B、One of the tables is recovered from the Recycle Bin using a Last In First Out (LIFO) approach.
  • C、Both the tables are recovered from the Recycle Bin with one table renamed to MY_TABLE2 and the other to a system-generated name.
  • D、None of the tables are recovered from the Recycle Bin, and the statement returns an error.

正确答案:B

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