Tableau: When to use live & extract ?

Question

When do we need to use live and when do we need to use extract ?

Answer 1

Extract connection is a connection to a static database that is updated every day / hour / period. The data is copied from the data source to the Tableau Server. Refreshing the data source doesn't give you the latest
data-you need to refresh the extract to get it.

Live connection will check the underlying data in the datasource / database-the latest results will be provided by refreshing the visualisation. No preprocessing data is copied to Tableau Server.

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