CREATE TABLE "during_regular_season" (
  "team" text,
  "outgoing_manager" text,
  "manner_of_departure" text,
  "date_of_vacancy" text,
  "replaced_by" text,
  "date_of_appointment" text,
  "position_in_table" text
);

Question: When was the date of appointment by Hugo Broos?
SQL: SELECT "date_of_appointment" FROM "during_regular_season" WHERE "replaced_by"='Hugo Broos';

Question: How many times did outgoing manager Bart de Roover vacated a position?
SQL: SELECT COUNT("date_of_vacancy") FROM "during_regular_season" WHERE "outgoing_manager"='Bart De Roover';

Question: Who was the outgoing manager of the team in 15th position that was sacked?
SQL: SELECT "outgoing_manager" FROM "during_regular_season" WHERE "manner_of_departure"='Sacked' AND "position_in_table"='15th';

Question: What was the team's position in table when Danny OST was the outgoing manager?
SQL: SELECT "position_in_table" FROM "during_regular_season" WHERE "outgoing_manager"='Danny Ost';