February 24, 2023 By Matthew Rathbone *

A transactional database is a type of database that is designed to handle transactional processing, which involves the management of transactions that occur within a database system. Transactions are a series of related database operations that are treated as a single unit of work. They ensure that the database remains in a consistent state, even if errors or failures occur during the execution of the transactions.

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Transactional databases are commonly used in business environments where it is important to maintain the integrity and consistency of data. For example, a bank’s database would need to be transactional to ensure that the correct amount of money is transferred between accounts during a transaction.

In a transactional database, transactions are treated as a sequence of operations that are either completed in their entirety or not at all. This means that if any part of a transaction fails, the entire transaction is rolled back and the database is returned to its previous state. This ensures that the database remains consistent and accurate, even in the face of errors or failures.

Transactional databases use a technique called “ACID” to ensure the integrity of transactions. ACID stands for Atomicity, Consistency, Isolation, and Durability. Atomicity means that either all of the operations within a transaction are completed, or none of them are. Consistency means that the database is always in a valid state, even after a transaction is completed. Isolation means that transactions do not interfere with each other and are executed independently. Durability means that once a transaction is completed, it is permanent and cannot be undone.

Transactional databases are typically based on the relational model, which organizes data into tables with rows and columns. They use Structured Query Language (SQL) to manipulate and query the data. SQL is a standard programming language used to create, modify, and query relational databases.

Transactional databases are used in a wide range of applications, including financial systems, e-commerce platforms, and supply chain management systems. They are particularly useful in environments where data accuracy and consistency are critical, such as in the financial industry where even a small error can have significant consequences.

Overall, a transactional database is a type of database that is designed to handle transactional processing and ensure the integrity and consistency of data. It is used in a variety of applications where data accuracy is important, and is based on the relational model and SQL.