Is there a built in way to export data to excel file?
I like to export the whole table
Unfortunately there is nothing exposed in the current version of DataBuilder, you'd have to write some code and run it externally for that. I'd encourage you to make a quick feature request and describe a bit about why you want it (even if you think it's obvious) as we look at those feature requests carefully when planning what to do.
It may be easier to write the table out to a CSV file and import that into Excel.