Access Control The way by which interactions with resources are limited to collections of users or programs for the purpose of enforcing integrity, confidentiality, or availability constraints.

ACID The four properties that are guaranteed by a transaction: atomicity, consistency, isolation, and durability. Atomicity exists when either all of the changes are committed or, if for any reason the transaction cannot be completed, all of the changes are rolled back to their prior state. Consistency means that a transaction starts with data in a consistent state and ends with data in a consistent state. The data is said to be in consistent state when it conforms to a set of invariants or rules, such as no duplicate keys or a column not allowing ...

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