I'm looking to create 5-digit random but unique alphanumeric codes, in the format of: letter, number, letter, number, letter. Example: d9h5e, p3g5a, c5x2w, y0v5v, s6c3q, i3v6a. I'm trying to avoid RANDBETWEEN because with the volume of codes we need to create (~6,500 to start) I want to ensure that all the codes are being created uniquely, without duplicates. And if we stick to letter, number, letter, number, letter, we will have 1.7 million variations.

Thanks!