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 for database transaction
From The Free On-line Dictionary of Computing (30 December 2018) :

  database transaction
      A set of related changes applied to a database.  The
     term typically implies that either all of the changes should be
     applied or, in the event of an error, none of them, i.e. the
     transaction should be atomic.  Atomicity is one of the ACID
     properties a transaction can have, another is isolation -
     preventing interference between processes trying to access the
     database cocurrently.  This is usually achieved by some form of
     locking - where one process takes exclusive control of a
     database table or row for the duration of the transaction,
     preventing other processes from accessing the locked data.
     The canonical example of a transaction is transferring money
     between two bank accounts by subtracting it from one and adding it
     to the other.
     Some relational database management systems require the user to
     explicitly start a transaction and then either commit it (if all
     the individual steps are successful) or roll it back (if there are
     any errors).

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