Oracle Database Interview Question:

How To Recover a Dropped Table in Oracle?

Submitted by: Administrator

If you accidentally dropped a table, can you recover it back? The answer is yes, if you have the recycle bin feature turned on. You can use the FLASHBACK TABLE ... TO BEFORE DROP statement to recover a dropped table from the recycle bin as shown in the following SQL script:

SQL> CREATE TABLE emp_dept_90
2 AS SELECT * FROM employees WHERE department_id=90;
Table created.

SQL> SELECT COUNT(*) FROM emp_dept_90;
COUNT(*)
----------
3

SQL> DROP TABLE emp_dept_90;
Table dropped.

SQL> FLASHBACK TABLE emp_dept_90 TO BEFORE DROP
2 RENAME TO emp_dept_bck;
Flashback complete.

SQL> SELECT COUNT(*) FROM emp_dept_bck;
COUNT(*)
----------
3

The FLASHBASK statement in this script recovered the dropped table "emp_dept_90" to new name "emp_dept_bck". All the data rows are recovered nicely.
Submitted by: Administrator