QlikView Data Files (QVD Files)

In QlikView, a QVD (QlikView Data) file is a proprietary file format used to store data in a fast, compressed, and efficient way. QVD files are used to store data that has been extracted from various sources, such as databases or flat files, and transformed into a format that can be easily loaded and analyzed in QlikView.

One of the main benefits of using QVD files is that they can be loaded much faster into QlikView than other file formats, such as CSV or Excel, because they are optimized for the QlikView engine. This makes QVD files particularly useful for large data sets or for data that needs to be loaded frequently, such as in a daily or hourly refresh.

In addition to loading data from QVD files, you can also use QlikView to create QVD files from your data. This can be useful for storing a snapshot of your data at a specific point in time, or for sharing data with other QlikView users.

To load data from a QVD file in QlikView, you can use the LOAD statement in your script. For example:

LOAD * FROM data.qvd (qvd);

This statement loads all fields from the data.qvd file into the current script. You can also use “SELECT” statement to specify which fields you want to load, or use WHERE clauses and other conditions to filter the data.

To create a QVD file in QlikView, you can use the STORE statement in your script. For example:

STORE data INTO data.qvd (qvd);

This statement stores the data in the current script into a QVD file named data.qvd. You can then use the SELECT statement to specify which fields you want to store, or use WHERE clauses and other conditions to filter the data.

Overall, QVD files are a useful tool for efficiently storing and loading data in QlikView. They can help in improving the performance of your data loads and make it easier to work with large data sets.