Add one seperate column to a table

Hello!
My current issue is that I want to add one column to another table. I already tried it with the node Joiner but somehow it always ends up duplicating my results. Can anyone help me with this?
Thank you!

See if this node works for you

Hi @Jutta1971,

What do you mean by:

Can you provide some examples and explain your issue a little bit more?

:blush: