Technology (Web App Development): Building an e-commerce platform or a web-based consultation app can cost anywhere between ₹3 lakhs to ₹10 lakhs depending on complexity.

I'm encountering an error when running node app.js after deployment. Dependencies are installed, but the error persists. Can anyone help? Here's the error.

I tried installing all dependencies with npm install and setting up environment variables. I expected the app to run successfully, but I’m encountering the error when running node app.js.

need it to return which drugs a patient is taking at the same time. I thought if I could turn the columns into arrays, I could iterate over them and see if start_date of a row is between start_date and end_date of other rows, where the pt_id matches.

Is there a way to do this without having to read it into a data frame in python?

I tried looking into procedures and T-SQL, where I found that a while loop exists, but I couldn't find where you can iterate over all the rows.