Needed guidance on How to create a function to apply it to a Row-Oriented Table

Hi,

could somebody give me a hint on How to create a function to apply it to a Row-Oriented Table, so it takes as an input the values of the rows of one column and then the output is binded to equivalent rows in another column?

I am unable to do this on my own since I don't find any examples on how to do this...

Thank you and regards,