Consistency (database systems)

Consistency (database systems)

In database systems, a consistent transaction is one that does not violate any integrity constraints during its execution. If a transaction leaves the database in an illegal state, it is aborted and an error is reported.

Consistency is one of the ACID properties.

ee also

* Atomicity
* Isolation
* Durability
* Relational Database Management System

* [http://www.articleworld.org/Database_consistency Database consistency article]


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Isolation (database systems) — In database systems, isolation is a property that defines how/when the changes made by one operation become visible to other concurrent operations. Isolation is one of the ACID (Atomicity, Consistency, Isolation, Durability) properties.Isolation… …   Wikipedia

  • Durability (database systems) — In database systems, durability is the ACID property which guarantees that transactions that have committed will survive permanently. For example, if a flight booking reports that a seat has successfully been booked, then the seat will remain… …   Wikipedia

  • Consistency (disambiguation) — Consistency can refer to: Consistency (negotiation), the psychological need to be consistent with prior acts and statements Consistency , an 1887 speech by Mark Twain The consistency criterion, a measure of a voting system requiring that where… …   Wikipedia

  • Atomicity (database systems) — In database systems, atomicity (or atomicness) is one of the ACID transaction properties. In an atomic transaction, a series of database operations either all occur, or nothing occurs. A guarantee of atomicity prevents updates to the database… …   Wikipedia

  • Database management system — A database management system (DBMS) is a software package with computer programs that control the creation, maintenance, and the use of a database. It allows organizations to conveniently develop databases for various applications by database… …   Wikipedia

  • Database — A database is an organized collection of data for one or more purposes, usually in digital form. The data are typically organized to model relevant aspects of reality (for example, the availability of rooms in hotels), in a way that supports… …   Wikipedia

  • Database transaction — A transaction comprises a unit of work performed within a database management system (or similar system) against a database, and treated in a coherent and reliable way independent of other transactions. Transactions in a database environment have …   Wikipedia

  • database management system (DBMS) — System for quick search and retrieval of information from a database. The DBMS determines how data are stored and retrieved. It must address problems such as security, accuracy, consistency among different records, response time, and memory… …   Universalium

  • Database caching — Many applications today are being developed and deployed on multi tier environments that involve browser based clients, web application servers and backend databases. These applications need to generate web pages on demand by talking to backend… …   Wikipedia

  • Real time database — A real time database is a processing system designed to handle workloads whose state is constantly changing (Buchmann). This differs from traditional databases containing persistent data, mostly unaffected by time. For example, a stock market… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”