Anonymous Asked in Cars &Transportation · 2 weeks ago

How do I undo in MySQL?

Basically: If you're doing a transaction just do a rollback. Otherwise, you can't "undo" a MySQL query. Show activity on this post. For some instrutions, like ALTER TABLE, this is not possible with MySQL, even with transactions (1 and 2). 27 мая 2010 г.


How do I undo a SQL query?

You can undo changes that aren't committed to source control yet. In the Object Explorer, right-click the object, folder, or database with changes you want to undo, select Other SQL Source Control tasks > Undo changes. Alternatively, right-click an object on the Commit tab, and click Undo changes.

How do I undo a 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.

What is undo log in MySQL?

An undo log record contains information about how to undo the latest change by a transaction to a clustered index record. If another transaction needs to see the original data as part of a consistent read operation, the unmodified data is retrieved from undo log records.

How can we ROLLBACK after Delete in MySQL?

If you want rollback data, firstly you need to execute autocommit =0 and then execute query delete, insert, or update.1begin transaction.2select * from Student.3delete from Student where Id=2.4select * from Student.5rollback.6select * from Student.

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