Description: Transaction consistency is a fundamental principle in the field of databases that ensures each transaction takes the database from one valid state to another. This means that when performing an operation, it ensures that all rules and constraints defined in the system remain intact. Consistency is part of the ACID properties (Atomicity, Consistency, Isolation, and Durability) that are essential for transaction management in databases. When a transaction is executed, it must meet all necessary conditions for the resulting data to be coherent and valid. If a transaction cannot meet these conditions, it must be rolled back, ensuring that the database does not end up in an intermediate or inconsistent state. This principle is crucial in applications where data integrity is vital, such as in financial systems, where an incorrect transaction could result in significant losses. Consistency not only refers to the validity of the data but also to the application of business rules and constraints that may be defined in the database schema. In summary, transaction consistency is a pillar that supports trust in database management systems, allowing users and applications to interact with accurate and reliable data.
