Qlikview Data Exchange File
A Qlikview Data Exchange (QVX) file contains data extracted from an external data source.
The QVX file is a Qlik-specific file format with .qvx extension, which contains individual memory-mapped files for each of the columns in the underlying data source. QVX has a well documented internal structure, optimized for streaming data from a database. You can use the QVX file as input files for Qlik products.