[SQL] Order By Question

[Tristan Colson]

This seems like the answer must be pretty easy, but I can't think of it:

In the following statement:

select field1 from my_table where field2 in (3, 1, 2);

How can I modify this statement so that the record are returned in the
order of first those records having field2 = 3, then field2 = 1, then
field2 = 2.
As it stands, I am getting them returned in the order of the value of
field1.