CREATE TABLE "125cc_classification" (
  "rider" text,
  "manufacturer" text,
  "laps" real,
  "time" text,
  "grid" real
);

Question: Can you tell me the average Laps that has the Time of +17.485, and the Grid smaller than 7?
SQL: SELECT AVG("laps") FROM "125cc_classification" WHERE "time"='+17.485' AND "grid"<7;

Question: Can you tell me the sum of Grid that has the Manufacturer of aprilia, and the sandro cortese?
SQL: SELECT SUM("grid") FROM "125cc_classification" WHERE "manufacturer"='aprilia' AND "rider"='sandro cortese';