It would be very helpful to get a dropdown, with an external data source, as a column type in Table Grid. We have a complex Db structure with many foreign keys so filling updating values is a hazel. Doing it in a table with dropdown would be immensely helpful
As a workaround, if you have a finite list, then you can format the column and change its type to Single Tag and you can provide options that will appear when editing that column in Tablegrid. For more info - check this
However, this request we have noted it down and will take it up soon. Currently, only static options for tag type format is allowed, we will provide an ability to provide dynamic options for format types.
Hope this helps!