The doubt of the identification of compound

I find the workflow of the lipid,the pdf hint the joiner of MS1 and MS2,I try it,but I don’t success. The final data is empty. I don’t know how to make codes.
Do you have nice advice?The dicussion as following


can you provide examples of the tables to be joined? Specifically the columns you want to join.
It is empty because it does not find any matches. Unfortunately KNIME only provides joins by EXACT matches, even for numeric columns.
Maybe you find an answer for inexact matching somewhere in the general KNIME forum?

Ok,Thank you very much!

I want to join the rt and the mz or the mz.