How do I compare user input to a table?

Hi there. I am new to Knime and I can’t find the answer any where. I am starting with a database table “Production Info”. I am trying to make an app where the user can input a production number string. I want to take their input and compare it to the production number column in “Table 1”. If their number is not in that column, I want to display text that says “Your number is invalid”.

How can I compare the user input to Table1?