I see pros and cons of the national data base.
Pros:
Eliminates "physician shopping" where patients search for doctors that will prescribe un-needed drugs.
If the database is openly accessed by the public then it's possible to see problems in the medical system, for example the sudden death syndrome that is currently associated with the Chinese virus "vaccination".
More complete medical records over time which can help diagnosis and treatment.
Cons:
Patients could potentially lose medical privacy.
Information could be used to institute "new" reforms, which may not be needed or desired.