Question: What shows for round when the race was Int. ADAC Preis von Zweibrücken?
SQL: SELECT "Round" FROM "2-17701581-2" WHERE "Race" = 'Int. ADAC Preis von Zweibrücken';

Question: What is the round for the Norisring circuit?
SQL: SELECT AVG("Round") FROM "2-17701581-2" WHERE "Circuit" = 'Norisring';

Question: What race was a round smaller than 8,  on 6 July?
SQL: SELECT "Race" FROM "2-17701581-2" WHERE "Round" < 8.0 AND "Date" = '6 July';

Question: What is the round for the Int. ADAC-Preis der Tourenwagen von Sachsen-Anhalt?
SQL: SELECT "Round" FROM "2-17701581-2" WHERE "Race" = 'Int. ADAC-Preis der Tourenwagen von Sachsen-Anhalt';