CREATE TABLE "season_by_season" (
  "season" text,
  "tier" real,
  "league" text,
  "postseason" text,
  "european_competitions" text
);

Question: What is the Season when league shows bundesliga, and a European competition of played korac cup?
SQL: SELECT "season" FROM "season_by_season" WHERE "league"='bundesliga' AND "european_competitions"='played korac cup';

Question: What is the average Tier when the postseason shows -, and the season is 2012–13?
SQL: SELECT AVG("tier") FROM "season_by_season" WHERE "postseason"='–' AND "season"='2012–13';

Question: What is the European competition when the tier is more than 2?
SQL: SELECT "european_competitions" FROM "season_by_season" WHERE "tier">2;