Hey everyone,

If my table looks like this:

id | colA   | colB | colC
===========================
1  | red    | blue | yellow
2  | orange | red  | red
3  | orange | blue | cyan

What SELECT query do I run such that the results returned are:

blue, cyan, orange, red, yellow

Basically, I want to extract a collective list of distinct values across multiple columns and return them in alphabetical order.

I am not concerned with performance optimization, because the results are being parsed to an XML file that will serve as a cache (database is hardly updated). So even a dirty solution would be fine.

Thanks for any help!