Table: football_league_two_managers
Columns: team
outgoing_manager
manner_of_departure
date_of_vacancy
replaced_by
date_of_appointment
position_in_table

Question: At what date did the 23rd manager vacate the position?
SQL: SELECT "date_of_vacancy" FROM football_league_two_managers WHERE "position_in_table" = '23rd'

Question: What was the date of appointment for the manager that replaced Simon Davies? 
SQL: SELECT "date_of_appointment" FROM football_league_two_managers WHERE "outgoing_manager" = 'Simon Davies'

Question: What was the date of appointment for the manager of the 23rd team?
SQL: SELECT "date_of_appointment" FROM football_league_two_managers WHERE "position_in_table" = '23rd'

Question: How many categories for, replaced by, exist when the outgoing manager is Alan Buckley? 
SQL: SELECT COUNT("replaced_by") FROM football_league_two_managers WHERE "outgoing_manager" = 'Alan Buckley'