Counting how many MySQL fields in a row are filled (or empty)

Question

I need to put together a method that would allow me to quantify how many fields in a row have been filled by a user.

For example:

User    Name    Age             


        

Answer 1

select 
    User,
    (
        case Name when '' then 0 else 1 end
        +
        case when Age is null then 0 else 1 end
        +
        case Country when '' then 0 else 1 end
        +
        case Gender when '' then 0 else 1 end
        +
        case when Height is null then 0 else 1 end
    ) * 100 / 5 as complete

Use the case according to what no info means: empty or null.