Question

I’m using Postgres and I’d like to know how to change row information within a query, Let’s say I have a column called Numbers and it’s got rows going 1,2,3,4,5 how could I edit the information in those rows? let’s say I want the query to display 1,1,1,1,5 how would I write in a query that each row should be changed to 1 unless it’s 5? Again it’s only to change it within the Query, I’m not trying to do an UPDATE I realize how newbish this is on my part but I couldn’t find this on google.

Answer 1

SELECT 
  CASE WHEN Numbers <> 5 THEN 1 ELSE Numbers END
FROM table

See 9.12. Conditional Expressions