A transaction is defined as a set of operations that perform a logical unit of work, commonly associated with financial activities like transferring money, withdrawing, or depositing funds. While the primary notion of a transaction entails monetary exchange, it also encompasses any change or interaction with a database. When completing a task, such as withdrawing money from an ATM, several operations must occur. This process includes inserting a card, verifying account information, selecting an account type, entering the withdrawal amount, inputting a PIN, and finally receiving the cash. Each of these steps constitutes a part of the overall transaction. Thus, a transaction represents not just the act of exchanging funds but also the collective operations performed to fulfill a specific task. The systematic nature of transactions holds significance in various contexts beyond just banking, including any process that involves interacting with a database.