Find the count of EMPTY or NULL columns in a MySQL table

Question

I have around 30 columns in a MySQL table. I want to calculate how many column fields for a particular row are empty. This table is for storing user information. I want to fin

Answer 1

As I understand it you have a table such as

id | FName | LName  | Age
1  | John  | ""     | NULL
2  | Mary  | Simons | NULL

And you want: row 1 has 2 empty/null fields, and row 2 has 1 empty/null fields

SELECT
    id,

    IF (FName IS NULL OR FName = '', 1, 0) + 
    IF (LName IS NULL OR LName = '', 1, 0) + 
    IF (Age IS NULL OR Age = '', 1, 0)
    as empty_field_count

Though now that I've written this I see Saul's response, I think that may have better performance that this solution.