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Notably both of Oracle's implementations depend on the database's rollback segment and so only allow temporal queries against recent changes which are still being retained for backup. Microsoft SQL Server (version 2016) implements temporal tables with SYSTEM_VERSIONING. [13] MariaDB 10.3 implements system-versioned tables. [14]
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...
Teradata version 13.10 and Teradata version 14 have temporal features based on TSQL2 [14] built into the database. IBM Db2 version 10 added a feature called "time travel query" [2] which is based on the temporal capabilities of the SQL:2011 standard. [1] Microsoft SQL Server introduced Temporal Tables as a feature for SQL Server 2016. The ...
In a database table, the transaction time is often represented as an interval allowing the system to "remove" entries by using two table-columns start_tt and end_tt. The time interval is closed [at its lower bound and open) at its upper bound. [8] When the ending transaction time is unknown, it may be considered as until_changed.
Microsoft SQL Server (Structured Query Language) is a proprietary relational database management system developed by Microsoft.As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications—which may run either on the same computer or on another computer across a network (including the Internet).
In temporal databases, valid-time is the time period when an event happened or something was true in the real world, or more formally when a fact was valid in the modeled reality. The valid-time period is an interval based on event times, which are referred to as event datetime in data vault .
Short title: Microsoft SQL Server/Print version - Wikibooks, open books for an open world; Author: hbossot: Image title: File change date and time: 16:12, 10 January 2016