Join a lot of columns with 'tab' separator (Column Combiner Node) (Combined string)

Hi friends

My table has 300 columns.

I need to “concatenate them into a single string using the ‘tab’ separator.”

Using the “column expression node,” I know that there is the

joinSep

function where I can use the rule

"\t"

to represent a TAB.

However, since I have 300 columns, it would be a lot of work to create a function like this:

joinSep(
"\t",
column1,
column2,
column3,
...
)

My analysis: I tried using the “Column Combiner node,” but in the delimiter field, when I tried to use

"\t"

, the system interpreted it as a string literal instead of a TAB character.

I found the “Column Combiner” more practical because I only need to move the desired columns to the right instantly.

Question: Is there a smarter way to do this?

Question: Is there a more practical way to perform the join on all 300 columns?

-----------------------Result that I need--------------------