CREATE TABLE "clausura_2007_standings" (
  "place_posici_n" real,
  "team_equipo" text,
  "played_pj" real,
  "won_pg" real,
  "draw_pe" real,
  "lost_pp" real,
  "goals_scored_gf" real,
  "goals_conceded_gc" real,
  "dif" real,
  "points_pts" real
);

Question: What is the highest number of games won where less than 21 games were conceded and less than 18 games were actually played?
SQL: SELECT MAX("won_pg") FROM "clausura_2007_standings" WHERE "goals_conceded_gc"<21 AND "played_pj"<18;

Question: What is the average number of goals conceded where more than 19 goals were scored, the team had 31 points, and more than 7 draws?
SQL: SELECT AVG("goals_conceded_gc") FROM "clausura_2007_standings" WHERE "goals_scored_gf">19 AND "points_pts"=31 AND "draw_pe">7;

Question: How many goals were conceded against the Chepo F.C. team where they lost 7 games?
SQL: SELECT "goals_conceded_gc" FROM "clausura_2007_standings" WHERE "lost_pp"=7 AND "team_equipo"='chepo f.c.';