Mastering Qlik Sense
by Ralf Becher, Karl Pover, Jason Michaelides, Dilyana Ivanova, David Alcobero, Martin Mahler, Juan Ignacio Vitantonio
QVD files
QVD stands for QlikView data file. This type of file contains data stored using Qlik Sense or QlikView. QVD files can be created and read with Qlik Sense. But what's so special about these files?
QVD files have a format that makes it very fast to load when using the Sense script. When properly optimized, loading data from these files can be 10 to 100 times faster than any other source. QVD files are the core of any Qlik project. I have not seen any project not taking advantage of these files.
One QVD file will contain data from only one table. The table must be loaded into Qlik Sense before it can be stored in QVD format.
In a real-life project, you would usually pull data from a database or any other source and store it in QVD ...
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