Over the past few days, I have been trying to find an answer to this problem. While I have not found an answer, this site keep appearing in my search results so I thought I
You could try (untested) something like
select form_id,
max(case data_label when 'lastName' then data_value else null end) as lastname,
max(case data_label when 'firstName' then data_value else null end) as firstname,
max(case data_label when 'phone' then data_value else null end) as phone
from mytable
group by form_id