How to construct the drug_era?

Implementers
1

dear all,
I have constructed the table drug_exposure, now I want to construct the table drug_Era, how can I do that? is there any construction such as SQL language, or something else?
thank you very much

2

Hello @pandamiao,

CDM repo on GitHub contains an example which might be helpful.

3

thank you very much @rookie_crewkie, it is very useful ！