CREATE TABLE "nfl_draft" (
  "round" real,
  "overall" real,
  "player" text,
  "position" text,
  "school_club_team" text
);

Question: What position is mentioned for Rice school?
SQL: SELECT "position" FROM "nfl_draft" WHERE "school_club_team"='rice';

Question: What is the average round for Wisconsin when the overall is larger than 238 and there is a defensive end?
SQL: SELECT AVG("round") FROM "nfl_draft" WHERE "overall">238 AND "position"='defensive end' AND "school_club_team"='wisconsin';

Question: What is the average round when there is a defensive back and an overall smaller than 199?
SQL: SELECT AVG("round") FROM "nfl_draft" WHERE "position"='defensive back' AND "overall"<199;