transaction

transaction. (ANSI) (1) A command, message, or input record that explicitly or implicitly calls for a processing action, such as updating a file. (2) An exchange between and end user and an interactive system. (3) In a database management system, a unit of processing activity that accomplishes a specific purpose such as a retrieval, an update, a modification, or a deletion of one or more data elements of a storage structure.

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