A typical example of a transaction is a bank transaction when a costumer
moves money from his account to another account. The transaction consists of
two operations. At the first operation we need to debit the savings account.
Then we credit the checkings account. It's only allowed to accept that these
two operations succeeds or nothing at all.
Here is my version of it:
A good example of a transaction is a bank transaction: a customer tranfers money from one account into another account. The transaction consists of
two operations. The first operation is to deposit the money into the savings account. Then the checkings account is credited. There are only two possible outcomes; these two operations are successful or unsuccessful.