Delete tables from database Oracle 10g

问题:

I have deleted some tables from an Oracle 10g database using the drop command.

When I list the tables using select * from cat; I get the following :

Are the tables deleted or not? Why do I have these BIN$... things? How can I remove them or the tables once and for all?

Thanks!

回答1:

They are entries in the Recycle Bin, created by the deletion of a table.

They can be purged if required.

http://docs.oracle.com/cd/B28359_01/server.111/b28310/tables011.htm

回答2:

The tables prefixed with BIN$ are tables placed in the recycle bin for easy recovery. You can completely remove them by purging it. Either specifically per table:

PURGE TABLE BIN$ABCDEFG;

Or for the entire recycle bin at once:

PURGE RECYCLEBIN;

回答3:

once you drop tables , they go to recyle bin for tempopary time in case you can to get them back ( by flashback for example) with time they diseapear , and if you want to remove at all you can do that.

回答4:

Documentation:

When you drop a table, the database does not immediately remove the space associated with the table. The database renames the table and places it and any associated objects in a recycle bin, where, in case the table was dropped in error, it can be recovered at a later time. This feature is called Flashback Drop, and the FLASHBACK TABLE statement is used to restore the table. Before discussing the use of the FLASHBACK TABLE statement for this purpose, it is important to understand how the recycle bin works, and how you manage its contents.

To delete pernamently use 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.

PURGE TABLE BIN$jsleilx392mk2=293$0;

Users can purge the recycle bin of their own objects, and release space for objects, by using the following statement:

PURGE RECYCLEBIN;