user: Question: Which Overall is the highest one that has a College of oklahoma, and a Pick # smaller than 4?
Columns: ['Round', 'Pick #', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 9.0, 9.0, 'Rick Bryan', 'Defensive Tackle', 'Oklahoma']
SQL:

assistant: SELECT MAX("Overall") FROM "Table" WHERE "College" = 'oklahoma' AND "Pick #" < 4.0;