See also Consistency_(database_systems), ACID (Atomicity, Consistency, Isolation, Durability)

Consistency, in the context of database management systems (DBMS), is a fundamental property that ensures the database remains in a valid state before and after transactions. It guarantees that the database transitions from one consistent state to another consistent state after the execution of each transaction. This means that transactions must adhere to predefined rules, constraints, and integrity constraints, maintaining the integrity of the data stored in the database. Consistency ensures that only valid data modifications are allowed, preventing the database from entering an invalid or inconsistent state. It plays a crucial role in preserving data accuracy and reliability, enabling applications to rely on the correctness of the data stored in the database. s://en.wikipedia.org/wiki/Consistency_(database_systems)