The _C_FACTTABLECOLUMN_ is the name of a key in the fact table (OBSERVATION_FACT) that links to the dimension code we are querying for.
Typical entries will be CONCEPT_CD, PATIENT_NUM, ENCOUNTER_NUM, or PROVIDER_ID.
The _C_FACTTABLECOLUMN_ is the name of a key in the fact table (OBSERVATION_FACT) that links to the dimension code we are querying for.
Typical entries will be CONCEPT_CD, PATIENT_NUM, ENCOUNTER_NUM, or PROVIDER_ID.