How do I limit the number of rows returned by an Oracle query after ordering?

Question

Is there a way to make an Oracle query behave like it contains a MySQL limit clause?

In MySQL, I can do this:

Answer 1

For each row returned by a query, the ROWNUM pseudocolumn returns a number indicating the order in which Oracle selects the row from a table or set of joined rows. The first row selected has a ROWNUM of 1, the second has 2, and so on.

  SELECT * FROM sometable1 so
    WHERE so.id IN (
    SELECT so2.id from sometable2 so2
    WHERE ROWNUM <=5
    )
    AND ORDER BY so.somefield AND ROWNUM <= 100 

I have implemented this in oracle server 11.2.0.1.0