How to minimize flows with a loop? What is the structure of a loop?

Hello! I’m not very familiar with KNIME, but I want to change that and I’m studying it extensively. However, I don’t understand how the loop works or how to configure it.Hello! I’m not very familiar with KNIME, but I want to change that and I’m studying it extensively. However, I don’t understand how the loop works or how to configure it. My intention is to take 8 csv files and put them into a database in Postgres. To do this, I set up the Postgres environment and added a node to the workflow. But I don’t know how to structure the loop, how to connect it, etc. I manually created the eight tables within the database. But this wouldn’t be feasible for everyday use. Can anyone help with the setup or provide a guide where I can learn more about the topic?