SQL: Select a list of numbers from “nothing”

Question

What is a fast/readable way to SELECT a relation from \"nothing\" that contains a list of numbers. I want to define which numbers by setting a start and end value. I am usi

Answer 1

Some other alternative (tried in postgres, but should be working with others)

select (0) as count union values (1),(2),(3),(4),(5)

Extending this sql with code will be straight forward.