Tableau Data Extracts To improve performance and data to allow for more advanced capabilities and to analyze offline you can use tableau data extracts which are saved subsets of a data source. You can make a Tableau data extract by defining filters and limits that contain the data you want in the Tableau extract. After creating a Tableau data extract you can refresh it through data from the original data source. You can either refresh the data, replacing all of the tableau data extract contents or you can increment the tableau extracts, which only add rows that are novel since the last refresh. Watch this video on Tableau for Beginners: Tableau data Extracts can Improve performance. Add functionality to file-based data sources, such as the ability to compute Count Distinct. Provide offline access to your data Creating a Tableau extracts Using tableau extracts Refreshing tableau data Extracts Adding Rows from a File Upgrading Legacy tableau extracts Optimizing Tableau extracts Once you are done with this tutorial, you can check out the list of Tableau Interview Questions For Freshers prepared by the experts, which will help you to crack any Tableau interview. And if you are interested in doing an end-to-end Tableau training, Intellipaat has curated just the right course, so that you gain all of the requisite skills in Tableau BI Tool.