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 https://docs.dhis2.org/2.34/en/dhis2_developer_manual/web-api.html#data-values
Hope this will help.

@dmaritim
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