SQL: Extract a string from between the 2nd and 3rd dashes (-), if they exist. Else N/A

Question

How to write SQL to extract the string from the 2nd and 3rd dashes on the "Campaign" column to a new column "Language".

If no 2nd and 3rd dashes, then "N/A". Thank you for your help!

Campaign	Language
na--en-abc	en
na-branded	N/A
ap--jp-xyz	jp
eu-uk-en-jjj	en

Answer 1

Consider below simple approach

select Campaign,
  ifnull(split(Campaign, '-')[safe_offset(2)], 'N/A') as Language
from your_table

If applied to sample data in your question - output is