Example 1: querying once to get the number of results, then a second time to get the actual results.
Example 2: When searching by name and a full state, compare the following queries:
// Runs in 30 seconds
SELECT COUNT(*) FROM Voters
WHERE ( lname = 'Gates' ) AND (Voters.CountyID between '02959' and '02991')
// Runs in 5 seconds
SELECT COUNT(*) FROM Voters USE INDEX...
