I'm reporting out of two universes published by Epic
1. Warehouse - Patient
2. Warehouse - Transactions
I wanted to join two queries based on the primary key for a hospital encounter. Following the tutorial seemed pretty straightforward until I got to displaying data from a merged query.
The table displayed results from Query1, but adding fields from Query2 wiped out all the data in the table, leaving only #datasync in each field.
My workaround to get fields from both queries displayed (see screenshot)
1. Merge queries on *two* fields - primary key of hospital encounter and primary key of patient
2. Create new variable
3. Make variable type Detail
4. Associate variable with hospital encounter key from Query1
5. Set formula equal to a field from Query2
I'm not sure why this workaround works 
or if what I'm experiencing is a symptom of something larger. Could this workaround be needed because I am merging on fields from a fact table instead of fields from a dimension table?
Thanks in advance