What is purge in DROP TABLE?
Use the PURGE statement to remove a table or index from your recycle bin and release all of the space associated with the object, or to remove the entire recycle bin, or to remove part of all of a dropped tablespace from the recycle bin.
What is DROP TABLE purge in Oracle?
PURGE. Specify PURGE if you want to drop the table and release the space associated with it in a single step. If you specify PURGE , then the database does not place the table and its dependent objects into the recycle bin.
What does purge mean in SQL?
Purging is the process of freeing up space in the database or of deleting obsolete data that is not required by the system. The purge process can be based on the age of the data or the type of data.
How do you do a flashback DROP TABLE?
Recover the Dropped Table
- Execute the FLASHBACK TABLE command to recover the dropped table. SQL>flashback table hr. regions_hist to before drop; Flashback complete.
- Once again query the HR. REGIONS_HIST table to verify the data has been restored.
- Exit from SQL*Plus.
What is Purge command?
The purge command enables you to purge the EBICS repository from the machine where you install it. The purge operates on the following items: Fetch data: The data store is cleaned (regardless of the fetched/unfetched status of the files), as well as the cursor table in the database and the lock files in the data store.
What is the difference between purge and drop?
Basically with oracle10, all dropped tables go into recycle bin from where they can be undropped. With purge you basically skip the recycle bin part and you drop the table without an option to undo the action.
How do I purge a table in Oracle?
When issuing a DROP TABLE statement in Oracle, you can specify the PURGE option. The PURGE option will purge the table and its dependent objects so that they do not appear in the recycle bin. The risk of specifying the PURGE option is that you will not be able to recover the table.
How do I purge a table in SQL?
SQL DELETE Statement
- DELETE FROM table_name WHERE condition;
- Example. DELETE FROM Customers WHERE CustomerName=’Alfreds Futterkiste’;
- DELETE FROM table_name;
- Example. DELETE FROM Customers;
Is purge same as delete?
The purging process allows an administrator to permanently remove data from its primary storage location, yet still retrieve and restore the data from the archive copy should there ever be a need. In contrast, the delete process also removes data permanently from a storage location, but doesn’t keep a backup.
Can we rollback after drop table?
You cannot roll back a DROP TABLE statement. Note: For an external table, this statement removes only the table metadata in the database.
Can a dropped table be recovered?
If a database backup doesn’t exist, a dropped table can be recovered from SQL database data and transaction log files. When it comes to recovery from a database in the Simple recovery model, it might fail as the Drop table transaction might have been overwritten. Even then, recovery is possible from the MDF file.