[beginners] transform table to other table

Hi,

I’m totally noob in data, I use knime for my personnal pleasure, so I 'm sorry if my question is stupid.

I want to transform and merge a big existing table (xlsx) to another existing table (xlsx). But column name are different. I make a this

Orange arrows need conditionnal data transformation. but later.

I search with JOIN, CONCATENATE… the data in table 1 must be found in the columns in table 2. Is there a visual way of doing this ? Or do you have to rename each column before merging?

thank a lot