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rollback

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A DBMS feature that reverses the current transaction out of the database, returning the data to its former state. A rollback is performed when processing a transaction fails at some point, and it is necessary to start over. See two-phase commit.

(database)rollback - Reverting data in a database to an earlier state, usually in response to an error or aborted operation.

In a transaction based database system, transactions are considered atomic. If an error occurs while performing a transaction, the database is automatically rolled back to the state at the previous commit.

Rollback may also be performed by an explicit rollback transaction.
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He's proposing a rollback in emissions of gases believed linked to global warming to 2000 levels by 2010, followed by additional rollbacks.
COOL DOWN, ARNOLD, ON WARMING by Daily News (Los Angeles, CA)
From suburban obsession with minutia rather than the broad picture, to subtle rollbacks in civil rights, to the drumbeat of fear that the so-called Counterrevolution plays to scare voters into falling in line with its social agenda, "The Strange Death of Liberal America" exposes all in no-nonsense, clear and charged language.
The Strange Death of Liberal America by Buhle, Willis M. / Reviewer's Bookwatch
Although we are disappointed that the benefits were removed from the bargaining table, we are proud to have never had a formal rollback of benefits anywhere in Michigan.
Blue state by Kosofsky, Sean / The Advocate (The national gay & lesbian newsmagazine)
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