Use SQL Server Management Studio
- Restore the database on a test server.
- In SQL Server Management Studio, right-click the database, select the Tasks sub-menu and then the Generate scripts command:
- In the Choose objects tab, switch to the Select specific database objects option and select the dropped table:
You can't "undo" a DROP TABLE . You can look and see if that MySQL had binary logging enabled, maybe you can extract some data from there. Other than that, you can forget about MySQL and are in the same class of problems of "I accidentally deleted some files from my filesystem".
Dropping a table removes the table definition from the data dictionary. All rows of the table are no longer accessible. All indexes and triggers associated with a table are dropped. All views and PL/SQL program units dependent on a dropped table remain, yet become invalid (not usable).
| Question ID 1481 | Which statement is true when a DROP TABLE command is executed on a table? |
|---|
| Option A | A.Any pending transactions on the table are rolled back. |
| Option B | B. The table structure and its deleted data cannot be rolled back and restored once the DROP TABLE command is executed. |
The contents of the recycle bin can be shown using the SHOW RECYCLEBIN command and purged using the PURGE TABLE command. As a result, a previously dropped table can be recovered from the recycle bin. Create a test table.
BACKUP:
- BACKUP: Use a SELECT INTO query:
- SELECT * INTO Customers20120605 FROM Customers.
- RESTORE WITH IDENTITY INSERT:
- Note: Sometimes SQL does not include the final [identity] column so it will need to be manually added at the end as the ,[identity]) for this query to work correctly.
Oracle Recovery Manager (RMAN) provides a comprehensive foundation for efficiently backing up and recovering the Oracle database. It is designed to work intimately with the server, providing block-level corruption detection during backup and restore.
Use the FLASHBACK TABLE statement to restore an earlier state of a table in the event of human or application error. The time in the past to which the table can be flashed back is dependent on the amount of undo data in the system.
Database point-in-time recovery (DBPITR) restores the database from backups prior to the target time for recovery, then uses incremental backups and redo to roll the database forward to the target time.
In the RENAME table statement:
- First, specify the name of the existing table which you want to rename.
- Second, specify the new table name. The new name must not be the same as another table in the same schema.
The auxiliary destination, an optional location on disk which can be used to store any of the auxiliary set datafiles, control files and online logs of the auxiliary instance during TSPITR. Files stored here can be deleted after TSPITR is complete.
When you drop a database, the files that underlie it are not moved to the Recycle Bin, they are actually deleted. It may be possible to 'recover' the data and log files with a third-party undelete utility.
You cannot roll back a DROP TABLE statement. Note: For an external table, this statement removes only the table metadata in the database. It has no affect on the actual data, which resides outside of the database.
First make a command line access to the database using the mysql.exe file present in xampp/php/bin folder. Delete the phpmyadmin database. Then, just import the create_tables. sql file to the phpmyadmin database .
Finding out who dropped a table using the transaction log
- USE [master]; GO. CREATE DATABASE [FnDbLogTest]; GO. USE [FnDbLogTest];
- CREATE TABLE [TestTable] ( [c1] INT IDENTITY, [c2] CHAR (100) DEFAULT 'a'); GO.
- SELECT OBJECT_ID (N'TestTable'); GO.
- DROP TABLE [TestTable]; GO.
When you execute a Truncate statement, it does not get logged in the log file as it is a DDL statement. So if you Truncate a table, you cannot Roll Back to a point in time before the truncate. However, in a Transaction, Rollback is permitted and functions just as any other rollback would.
The DROP command is used to remove table definition and its contents. Whereas the TRUNCATE command is used to delete all the rows from the table. DROP is a DDL(Data Definition Language) command. Whereas the TRUNCATE is also a DDL(Data Definition Language) command.
To perform the Flashback Drop operation:
- Connect SQL*Plus to the hr schema and obtain the name of the dropped table in the recycle bin.
- Retrieve the dropped table using the FLASHBACK TABLE …
- If the retrieved table had referential constraints before it was placed in the recycle bin, then re-create them.
By default they are disabled for all tables, but it can be activated, and will preserve your data even after a truncate. Moreover, even if you have the FDAs, you cannot just flashback the table, because TRUNCATE is a DDL operation, and will throw you an error that the table definition has been changed.
After you commit the transaction, the changes are visible to other users' statements that execute after the commit. You can roll back (undo) any changes made during the transaction with the ROLLBACK statement (see ROLLBACK.
To restore your database to a guaranteed restore point, follow the steps below:
- $>
- $> sqlplus / as sysdba;
- SQL> select current_scn from v$database;
- SQL> shutdown immediate;
- SQL> startup mount;
- SQL> select * from v$restore_point;
- SQL> flashback database to restore point CLEAN_DB;
- SQL> alter database open resetlogs;
