If you are able to write custom SQL (meaning your data source is something other than an excel/csv file) you can also achieve the same thing as the UNPIVOT using an UNION in SQL. Prob an easier/more direct way of getting your data in the shape needed. Would look something like this:
SELECT
ID as ID,
Create Date as Date,
"Create Date" as Type
FROM YourTable
UNION ALL
ID as ID,
Resolved Date as Date,
"Resolved Date" as Type
FROM YourTable