"In Oracle, a single connection of an authenticated Oracle user to a database for a period of time. A given user may have several sessions running at the same time. Sessions may be long (as when a developer connects to Oracle via SQL*Plus) or short (as when the Oracle web gateway produces a single web page)." (Bill Pribyl & Steven Feuerstein, "Learning Oracle PL/SQL", 2001)
"In English Query, a sequence of operations performed by the English Query engine. A session begins when a user logs on and ends when the user logs off. All operations during a session form one transaction scope and are subject to permissions determined by the logon username and password." (Anthony Sequeira & Brian Alderman, "The SQL Server 2000 Book", 2003)
"A block of time during which a user interacts with a database." (Jan L Harrington, "SQL Clearly Explained" 3rd Ed., 2010)
"A period of time when a connection is active and communication can take place. For the purpose of data communication between functional units, session also refers to all the activities that take place during the establishment, maintenance, and release of the connection." (Microsoft, "SQL Server 2012 Glossary", 2012)
"A logical or virtual connection between two stations, software programs, or devices on a network that allows the two elements to communicate and exchange data for the duration of the session." (Sybase, "Open Server Server-Library/C Reference Manual", 2019)
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