Can we rollback after COMMIT?

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.

Can we rollback to savepoint after commit?

You can only roll back to the most recently marked savepoint. An implicit savepoint is marked before executing an INSERT , UPDATE , or DELETE statement. If the statement fails, a rollback to the implicit savepoint is done.

Can we rollback committed transaction in SQL?

Once SQL Server commits a transaction, you cannot run the ROLLBACK statement.

How do I rollback a commit in SQL?

The ROLLBACK command is the transactional command used to undo transactions that have not already been saved to the database. This command can only be used to undo transactions since the last COMMIT or ROLLBACK command was issued.

Can we rollback after commit in MySQL?

No, there's no query that will "undo" a committed data-modifying query. If you have a backup of the database, you can restore the backup and use DBA tools (in MySQL's case, it's mysqlbinlog) to "replay" all data-modifying queries from the logs since the backup back to the database, but skip over the problem query.

COMMIT and ROLLBACK (Introduction to Oracle SQL)

Can we rollback after truncate?

You cannot ROLLBACK TRUNCATE

Simply, you cannot rollback a transaction if it is already committed but you can do something else to get the data back (or at least some parts of it). When you execute the TRUNCATE statement, your data is still in the MDF file.

Can we rollback after delete?

DROP and TRUNCATE are DDL commands, whereas DELETE is a DML command. DELETE operations can be rolled back (undone), while DROP and TRUNCATE operations cannot be rolled back.

Can we ROLLBACK after COMMIT in Oracle?

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.

Do we need COMMIT after insert?

So yes, by default, if you're just using INSERT , the records you insert will be committed, and there is no point trying to roll them back.

Which statement Cannot be rolled back?

Some statements cannot be rolled back. In general, these include data definition language (DDL) statements, such as those that create or drop databases, those that create, drop, or alter tables or stored routines.

Can we undo the effect of a committed transaction?

Once a transaction has been committed, we cannot undo its effect by aborting it.

Can we ROLLBACK after commit in DB2?

We can revert all the changes done on a COBOL-DB2 program using the ROLLBACK statement. However, ROLLBACK is only applicable until COMMIT has not been issued. If we have used a COMMIT statement, then ROLLBACK will revert all the changes made in DB2 tables after the last COMMIT point.

Can we rollback to same savepoint more than once?

The specified SQL savepoint also remains active after the ROLLBACK TO statement has been executed. This means the ROLLBACK TO statement can be executed in the same transaction more than once by specifying the same SQL savepoint name.

How many savepoints can be used in SQL?

I know that on Oracle 7 the default was 5 and it could be raised to 255 by setting the Oracle SAVEPOINTS initialization parameters.

Do we need commit after delete?

DELETE requires a COMMIT, but TRUNCATE does not.

Does drop table need commit?

CREATE TABLE and DROP TABLE statements do not commit a transaction if the TEMPORARY keyword is used. (This does not apply to other operations on temporary tables such as ALTER TABLE and CREATE INDEX , which do cause a commit.)

Is delete autocommit in Oracle?

Drop {Delete or drops} the table with it's structure. It is autocommit statement. Drops Once fired can not be rolled back.

Can we use commit in trigger?

Yes, you can commit inside the trigger. But for this you have to make this trigger transaction to be an Independent transaction from its parent transaction, you can do this by using Pragma. Pragma AUTONOMOUS_TRANSACTION allow you to build the Independent (child) Transaction, started by another.

Which is faster commit or rollback in Oracle?

As we know COMMIT operation save changes made in a transaction to the database while ROLLBACK undo those changes. Its observed, generally COMMIT is a faster process than a ROLLBACK operation.

Can we rollback create table?

The CREATE TABLE statement in InnoDB is processed as a single transaction. This means that a ROLLBACK from the user does not undo CREATE TABLE statements the user made during that transaction.

Can we rollback DDL commands?

Some statements cannot be rolled back. In general, these include data definition language (DDL) statements, such as those that create or drop databases, those that create, drop, or alter tables or stored routines. You should design your transactions not to include such statements.

What is the use of commit and rollback in SQL?

The COMMIT statement lets a user save any changes or alterations on the current transaction. These changes then remain permanent. The ROLLBACK statement lets a user undo all the alterations and changes that occurred on the current transaction after the last COMMIT.

Can we rollback after update in SQL Server?

You just have to write the statement ROLLBACK TRANSACTION, followed by the name of the transaction that you want to rollback. Now, try to run the AddBook transaction to insert the record where the name is Book15 (make sure that no book with this name already exists in the Books table).

Which is faster DROP or TRUNCATE?

The TRUNCATE command is faster than both the DROP and the DELETE command. Like the DROP command we also can't rollback the data after using the this command.