How many teams had gary megson as an incoming manager
CREATE TABLE "managerial_changes" (
  "team" text,
  "outgoing_manager" text,
  "manner_of_departure" text,
  "date_of_vacancy" text,
  "incoming_manager" text,
  "date_of_appointment" text,
  "position_in_table" text
);
SELECT COUNT("position_in_table") FROM "managerial_changes" WHERE "incoming_manager"='Gary Megson';