When running a SOQL query or Salesforce report, a link is established between the data range and Salesforce so that you could always refresh the data from Salesforce later with a single click on the Refresh button:

 

The refresh button will re-pull data for all reports and SOQL queries that where executed and placed in the currently active worksheet.

If you want to refresh the data in all your worksheets, use the Refresh All button in the command bar: