I have a question regarding Contact Builder.
What exactly does the Help page mean when it says: "The app also links customer data back to the original contact record."?
By this I thought that I would be able to link/merge in data into my emails from parameters from "downstream" data extensions. E.g., if I use the P.I. data designer, I could merge in Regular Price and Sales Price in the email even though that information is linked to the original Data Extension (See screenshot).
However, when I tried this with a "downstream" variable called "product_id" I would use this code syntax:
%%[ VAR @product_id SET @product_id = [product_id] ]%% %%=v(@product_id)=%%
However, got the following error:
subscriber preview failed to generate. Review the details, correct all issues, and try again. An unrecognized expression appears in a script block. Script Expression: [product_id]
What am I missing? How can I associate the merge field options from the "downstream" data extensions?
Thanks for your help!