text: --fetchFirstTournamentNameById(1) - Tournament name: RolandGaros
  --fetchTournamentNameByPlayerName(Rafael Nadal) - Tournament name: RolandGaros
  INSERT INTO tournament (id, name) VALUES (1, 'RolandGaros');
  INSERT INTO tennis_player (id, name, tournament_id) VALUES (1, 'Rafael Nadal', 1);
  
  --fetchFirstTournamentNameById(1) - This tournament has no name!
  --fetchTournamentNameByPlayerName(Rafael Nadal) - This tennis player doesn't exist!
  --INSERT INTO tournament (id, name) VALUES (1, null);
  --INSERT INTO tennis_player (id, name, tournament_id) VALUES (1, null, null);
  
  --fetchFirstTournamentNameById(1) - This tournament has no name!
  --fetchTournamentNameByPlayerName(Rafael Nadal) - This tennis player doesn't exist!
  --INSERT INTO tournament (id, name) VALUES (1, null);
  --INSERT INTO tennis_player (id, name, tournament_id) VALUES (1, null, 1);
  
  --fetchFirstTournamentNameById(1) - Tournament name: RolandGaros
  --fetchTournamentNameByPlayerName(Rafael Nadal) - This tennis player doesn't exist!
  --INSERT INTO tournament (id, name) VALUES (1, 'RolandGaros');
  --INSERT INTO tennis_player (id, name, tournament_id) VALUES (1, null, 1);
  
  --fetchFirstTournamentNameById(1) - This tournament has no name!
  --fetchTournamentNameByPlayerName(Rafael Nadal) - This tournament has no name!
  --INSERT INTO tournament (id, name) VALUES (1, null);
  --INSERT INTO tennis_player (id, name, tournament_id) VALUES (1, 'Rafael Nadal', 1);
  
  --fetchFirstTournamentNameById(1) - Tournament name: RolandGaros
  --fetchTournamentNameByPlayerName(Rafael Nadal) - This tournament doesn't exist!
  --INSERT INTO tournament (id, name) VALUES (1, 'RolandGaros');
  --INSERT INTO tennis_player (id, name, tournament_id) VALUES (1, 'Rafael Nadal', null);