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

Question: When was the date of appointment for St. Johnstone's manager? 
SQL: SELECT "date_of_appointment" FROM "managerial_changes" WHERE "team"='St. Johnstone';

Question: Who was the outgoing manager for Aberdeen? 
SQL: SELECT "outgoing_manager" FROM "managerial_changes" WHERE "team"='Aberdeen';

Question: When was the date of appointment for the manager replacing Wim Jansen? 
SQL: SELECT "date_of_appointment" FROM "managerial_changes" WHERE "outgoing_manager"='Wim Jansen';