Time travelling with SQL Server

Time machineOne of the new interesting features in SQL Server 2016 is the system-versioning with a catchy name, Temporal Tables. The name of the feature offers a hint to its purpose, to collect and to keep historical information about the data changes inside the database over a period of time. Instead of having just the latest data, we now have a way to know what it has been in any previous point in time. The most obvious use case for Temporal Tables is auditing, or at least it is to me, but they can be used for other purposes as well. Some examples are going back in time in case you need to perform a data recovery from an error or a data change operation gone bad, or you might want to use it for reporting purposes.

There are few things about the Temporal Tables that are good to know. First of all the work needed to keep track of the changes is done by the database engine when the system-versioning feature is enabled. Another thing some of you might appreciate is that the feature is available also in Standard Edition. And finally my favorite, it’s actually rather easy to start using the system-versioning as we will discover shortly.

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