CREATE TABLE "classification" (
  "driver" text,
  "constructor" text,
  "laps" real,
  "time_retired" text,
  "grid" real
);

Question: I want the lowest Grid for Rolf Stommelen
SQL: SELECT MIN("grid") FROM "classification" WHERE "driver"='rolf stommelen';

Question: I want the constructor for grid less than 20 and Laps of 6
SQL: SELECT "constructor" FROM "classification" WHERE "grid"<20 AND "laps"=6;