CREATE TABLE table_57085 ("Name" TEXT, "Years" TEXT, "Area" TEXT, "Authority" TEXT, "Decile" FLOAT, "Roll" FLOAT)

Name the highest Decile for roll more than 325 and area of warkworth
SELECT MAX("Decile") FROM table_57085 WHERE "Roll" > '325' AND "Area" = 'warkworth'
SELECT MAX("Decile") FROM "table_57085" WHERE "Area" = 'warkworth' AND "Roll" > '325'