Period id

Hello Team
I want to import data into the datavalue table but under the periodid column in my data I only have the actual dates how can I go about this, or how do I generate the periodids?
kindly assist where necessary

@Kenyuri in my opinion the best way is to use the data import functionality. You prepare a CSV or JSON file of you data for import.
Read more on the formats of data in the following link
Hope this will help.

Thank you so much for your suggestion
It worked out

Whats the next step after data import?
I wish to visualize the data through pivot table