CREATE TABLE "stats" (
  "match" real,
  "date" text,
  "competition_or_tour" text,
  "ground" text,
  "opponent" text,
  "score1" text
);

Question: What ground had Portsmouth reserves as an opponent?
SQL: SELECT "ground" FROM "stats" WHERE "opponent"='portsmouth reserves';

Question: What ground had a match smaller than 6 and Chelsea Reserves as the opponent?
SQL: SELECT "ground" FROM "stats" WHERE "match"<6 AND "opponent"='chelsea reserves';