I need to develop a small application integrated in sharepoint. I am using the 2019 version on on premise. The application consists of data entry, sql queries for loading data into the fields. I want to use the latest approaches for this purpose. I still have time, but I don’t know which way to go.
I looked at a lot of solutions without code, but as I understand it, I need to move in the direction of JS, at the same time I want to save it in sharepoint lists or where to store the entered data. But how can I get data from the external MSSQL database, use node.js or the web part, REST. I am very confused, help me please. I developed applications on C # windows form with ado.net, if I know the direction I will figure it out in JS.