A transaction property, also known as a transaction characteristic or a transaction attribute, is a feature or a characteristic of a transaction that determines the behavior or the effects of the transaction on a database. Transaction properties are used to control or to specify the behavior or the effects of a transaction on a database, and to provide a mechanism for ensuring the integrity, the consistency, and the reliability of the data in a database.

There are several transaction properties or characteristics that are commonly used in a database management system (DBMS), including:

• Atomicity: Atomicity is a transaction property that ensures that a transaction is treated as a unit of work or a logical operation, and that it is either completed or rolled back in its entirety. Atomicity is used to ensure that a transaction is either fully executed or fully undone, and that it is not left in an intermediate or an inconsistent state.
• Consistency: Consistency is a transaction property that ensures that a transaction preserves the integrity or the correctness of the data in a database, and that it does not violate any constraints or rules. Consistency is used to ensure that a transaction does not leave the data in a database in an inconsistent or an invalid state, and that it maintains the integrity or the correctness of the data.
• Isolation: Isolation is a transaction property that ensures that the changes or the effects of a transaction are not visible or not available to other transactions until the transaction is completed or committed. Isolation is used to prevent other transactions from accessing or modifying the data that is being changed or modified by a transaction, and to ensure that the changes or the effects of a transaction are isolated or isolated from other transactions.
• Durability: Durability is a transaction property that ensures that the changes or the effects of a transaction are persisted or made permanent in a database, and that they are not lost or forgotten even in the event of a failure or a crash. Durability is used to ensure that the changes or the effects of a transaction are recorded or saved in a database, and that they are available or recoverable after a transaction is completed or committed.

Transaction properties or characteristics are an important aspect of database management, and they are used to control or to specify the behavior or the effects of a transaction on a database, and to provide a mechanism for ensuring the integrity, the consistency, and the reliability of the data in a database. Transaction properties are usually implemented using transactions, locks, and isolation levels, and they are usually specified using the BEGIN TRANSACTION, COMMIT TRANSACTION, ROLLBACK TRANSACTION, and SAVEPOINT statements or commands.