What is the difference between working with live data and extracted data in Tableau?

Tableau Data Extracts are snapshots of data optimized for aggregation and loaded into system memory to be quickly recalled for visualization. Live connections offer the convenience of real-time updates, with any changes in the data source reflected in Tableau.

What is extract and live in tableau?

Live and extracts are two ways you can make the data connection to the tableau. Live allows you real-time data while extracts are kind of batch which needs to be refreshed from time to time to get the updated data.

How does live connection work in Tableau?

Live connection. This refers to a data source that contains direct connection to underlying data, which provides real-time or near real-time data. With a live connection, Tableau makes queries directly against the database or other source, and returns the results of the query for use in a workbook.

What is a Tableau extract?

Extracts are saved subsets of data that you can use to improve performance or to take advantage of Tableau functionality not available or supported in your original data. After you create an extract, you can refresh it with data from the original data.

What are the applications of Pentaho suite Pentaho?

Pentaho is business intelligence (BI) software that provides data integration, OLAP services, reporting, information dashboards, data mining and extract, transform, load (ETL) capabilities. Its headquarters are in Orlando, Florida.

Which of the following are valid reasons to use extracts over live connections?

Extracts often have several benefits: Speeding up the workbook through optimisation – The extract is embedded within the workbook (see above). Thus, extracts are often much faster than live connections, especially when concerning complex visualizations e.g. large data sets or many filters.

Does Tableau Public support live connection?

It is only possible to have a live data connection to a Tableau Public workbook if you use a Google sheets data source. For all other data sources (like excel or a csv) it is not possible to save to Tableau Public any workbooks with a live connection to a data source. An extract needs to be generated.

How do you use extracts in Tableau?

Choose the rows to extract Select the number of rows you want to extract. You can extract All rows or the TopN rows. Tableau first applies any filters and aggregation and then extracts the number of rows from the filtered and aggregated results.