Create a table in Calc

Hi:

I’ve got several records I want to insert into a table, but the number of records are not always the same, and I can’t create a table with empty rows, so I’d like to create a table that automatically inserts a new row when you press the TAB key in the last cell. Is this possible in Calc?.

Thanks & greets from Argentina (Hope it is from England someday)
Marcelo.