Recover a Dropped Table in Oracle

Q

How To Recover a Dropped Table in Oracle?

✍: FYIcenter.com

A

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.

⇒ Recycle Bin - Storage to Hold Dropped Tables in Oracle

⇐ Show All Columns in an Existing Table in Oracle

⇑ Managing Oracle Database Tables

⇑⇑ Oracle Database Tutorials

2019-05-14, 2654🔥, 0💬

Delete a Column in an Existing Table in Oracle
How To Delete a Column in an Existing Table in Oracle? If you have an existing column in a table and you need that column any more, you can delete it with ALTER TABLE ... DROP COLUMN statement. Here is an example SQL script: SQL> CREATE TABLE emp_dept_90 2 AS SELECT * FROM employees WHERE dep... 2019-05-25, 3135🔥, 0💬

Add a New Column to an Existing Table with a Default Value in Oracle
How To Add a New Column to an Existing Table with a Default Value in Oracle? If you want to add a new column to an existing table, and insert a default value in this column on all existing data rows, you can use the ALTER TABLE ... ADD statement with the DEFAULT clause. Here is an example script: SQ... 2019-05-25, 3122🔥, 0💬

Show All Columns in an Existing Table in Oracle
How To View All Columns in an Existing Table in Oracle? If you have an existing table and want to know how many columns are in the table and how they are defined, you can use the system view USER_TAB_COLUMNS as shown in the following tutorial exercise: SQL> COL data_type FORMAT A12; SQL&g... 2019-05-14, 3036🔥, 0💬

Turn On and Off Recycle Bin for the Session in Oracle
How To Turn On or Off Recycle Bin for the Session in Oracle? If you want to control the recycle bin feature in your own session, you can use the ALTER SESSION statement to turn on or off. Here is an example SQL script: SQL> connect HR/fyicenter Connected. SQL> SELECT COUNT(*) FROM recy... 2019-05-10, 2857🔥, 0💬

Add a New Column to an Existing Table in Oracle
How To Add a New Column to an Existing Table in Oracle? If you have an existing table with existing data rows, and want to add a new column to that table, you can use the ALTER TABLE ... ADD statement to do this. Here is an example script: SQL> connect HR/fyicenter Connected. SQL> CREA... 2019-05-25, 2756🔥, 0💬

Rename a Column in an Existing Table in Oracle
How To Rename a Column in an Existing Table in Oracle? Let's say you have an existing with an existing column, but you don't like the name of that column, can you rename that column name? The answer is yes. You can use the ALTER TABLE ... RENAME COLUMN statement to do this. See the following SQL scr... 2019-05-25, 2749🔥, 0💬

Empty Your Recycle Bin in Oracle
How To Empty Your Recycle Bin in Oracle? If your recycle bin is full, or you just want to clean your recycle bin to get rid of all the dropped tables, you can empty it by using the PURGE statement in two formats: PURGE RECYCLEBIN - Removes all dropped tables from your recycle bin. PURGE TABLE table_... 2019-05-10, 2748🔥, 0💬

Recycle Bin - Storage to Hold Dropped Tables in Oracle
What Is Recycle Bin in Oracle? Recycle bin is a logical storage to hold the tables that have been dropped from the database, in case it was dropped in error. Tables in recycle bin can be recovered back into database by the Flashback Drop action. Oracle database recycle save the same purpose as the r... 2019-05-14, 2739🔥, 0💬

Recover a Dropped Table in Oracle
How To Recover a Dropped Table in Oracle? 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 follo... 2019-05-14, 2655🔥, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.