Table: npl_managers_2010_11
Columns: team
outgoing_manager
manner_of_departure
date_of_vacancy
incoming_manager
date_of_appointment

Question: when was the next coach appointed after niger tornadoes fired their coach?
SQL: SELECT "date_of_appointment" FROM npl_managers_2010_11 WHERE "manner_of_departure" = 'fired' AND "team" = 'Niger Tornadoes'

Question: how many managers left sunshine stars?
SQL: SELECT COUNT("outgoing_manager") FROM npl_managers_2010_11 WHERE "team" = 'Sunshine Stars'

Question: how many new managers replaced  manager(s) who resigned? 
SQL: SELECT COUNT("incoming_manager") FROM npl_managers_2010_11 WHERE "manner_of_departure" = 'Resigned'

Question: how many times did tunde abdulrahman leave the team?
SQL: SELECT COUNT("date_of_vacancy") FROM npl_managers_2010_11 WHERE "outgoing_manager" = 'Tunde Abdulrahman'