August 2019
Beginner to intermediate
696 pages
15h 45m
English
book
Mastering SQL Server 2017
by Milos Radivojevic, Dejan Sarka, William Durkin, Christian Cote, Matija Lah
Content preview from Mastering SQL Server 2017
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What is temporal data?
In a table with temporal support, the header represents a predicate with at least one time parameter that represents when the rest of the predicate is valid; the complete predicate is therefore a timestamped predicate. Rows represent timestamped propositions, and the row's valid time period is expressed with one of two attributes: since (for semi temporal data) or during (for fully temporal data); the latter attribute is usually represented with two values, from and to. The following table shows the original and two additional timestamped versions of an exemplary Suppliers table:
Original Suppliers table and two tables ...
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