Question

So say I have something like this

SELECT CONCAT(fname, " " IFNULL(mname, ""), lname) FROM name

how would I add a space to that statement if mname is not null? Nothing i’ve tried has worked and I’m kind of lost.
Obviously I can do something like

SELECT CONCAT(fname, " " IFNULL(mname, ""), " " lname) FROM name

but then that gives me two spaces instead of 1.

Answer 1

Use another CONCAT in the middle name:

SELECT CONCAT(fname, 
              IF(mname is null, "", CONCAT(" ", mname)), 
              " " lname) 
  FROM name