Date Selector for csv download

Not to get what you want, no.

No, nothing to do with JSON. Just a regular Query column.

That suggests that you are using a Form Screen. Don’t do that.
Instead use Show New Screen->this Item

That’s all quite doable, but again - don’t use a form screen.
Here is a summary of what you need to do:

  • Create two user specific date/time columns: one for the start date and one for the end date
  • Add two date picker components to your slide in screen. Target one at each of the user specific columns.
  • Create a Query column and target it at your Data table, then apply the following filters:
    – Date is on or after This row->Start Date
    – Date is on or before This row->End Date
  • Now add a button to your slide in screen, and configure the action to export the CSV, using the Query column as the source.