Is it possible to insert a prefix in front of existing SKU's?

Question

We are looking to insert 2 digits in front of all of our SKU's to help make them more unique and to make them differ from everyone else's who sell the same product. Is it possible using SQL to perform this?

So for example looking to make an SKU like:

ABC123

become -

ZX-ABC123

Any ideas on a starting point at least? We have over 150,000 SKU's so it's not something we can manually do unfortunately.