[Solved] How can I improve this query to avoid using nested views? [closed]
Familiarize with the data that you have: The first key thing is to understand what data you have. Here in this case, you have four tables InsuranceCompanies Patient Doctors Visits Your goal: Find the list of all the patients who visited all orthopedists (specialty) associated with their Insurance Companies. Let’s take a step back and … Read more