SQL performance MAX()

Question

Just got a small question. When trying to get a single max-Value of a table. Which one is better?

SELECT MAX(id) FROM myTable WHERE (whatever)

Answer 1

All query optimizers worth their salt should produce query plans with identical performance for both queries: if there is an index on the column being optimized, both queries should use it; if there is no index, both would produce a full table scan.