What is the Difference between connect live and import all data and Import some data.?

• Connect live – Creates a direct connect to your data. The speed of your data source will determine performance.

• Import all data – Imports the entire data source into Tableau’s fast data engine as an extract. The extract is saved with the workbook.

• Import some data – Imports a subset of your data into Tableau’s fast data engine as an extract. This option requires you to specify what data you want to extract using filters.