Referencing 2 tables on a single start expression

[Rafael_ANEIC-PY]

Hello friends, the problem i have come upon is that i’m trying to load information from different tables into a single workflow doc template, i’d like to pull a list of unique ids from [TABLE A], and be able to use that list of ids using the context of [TABLE B] for the columns inside said start expression.

Is there a way to do this without having those tables directly referencing each other?

To give a better idea of my problem, imagine a basic shopping app, where a customer picks some products and amounts, a simple workflow doc template would display a list of the items and amounts the customer bought for that given order.

In my case i need to display all the items that the customer is able to buy, even those that he hasn’t purchased, that list of all products is in [TABLE A], and the individual item purchase records are in [TABLE B].