CREATE TABLE "year_by_year" (
  "year" real,
  "division" text,
  "league" text,
  "regular_season" text,
  "playoffs" text,
  "open_cup" text
);

Question: What year did the Nashville Metros have the Regular Season 2nd, central?
SQL: SELECT "year" FROM "year_by_year" WHERE "regular_season"='2nd, central';

Question: What division did the Nashville Metros play in during the year that they did not qualify for the Playoffs, where in the USL PDL League, and had the Regular Season 7th, Southeast?
SQL: SELECT "division" FROM "year_by_year" WHERE "playoffs"='did not qualify' AND "league"='usl pdl' AND "regular_season"='7th, southeast';

Question: What was the average year that the Nashville Metros did not qualify for the Playoffs, did not qualify for the Open Cup, and had the Regular Season 7th, Southeast?
SQL: SELECT AVG("year") FROM "year_by_year" WHERE "playoffs"='did not qualify' AND "open_cup"='did not qualify' AND "regular_season"='7th, southeast';