user: Question: Name the highest Decile for roll more than 325 and area of Warkworth
Columns: ['Name', 'Years', 'Area', 'Authority', 'Decile', 'Roll']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Ahuroa School', '1–8', 'Ahuroa', 'State', 7.0, 80.0]
SQL:

assistant: SELECT MAX("Decile") FROM "Table" WHERE "Roll" > 325.0 AND "Area" = 'Warkworth';