Table: railway_station_schedule
Columns: platform
frequency_per_hour
destination
service_pattern
operator
line

Question: Which line offers Fast to Norwood Junction?
SQL: SELECT "line" FROM railway_station_schedule WHERE "service_pattern" = 'Fast to Norwood Junction'

Question: Who is the operator to Highbury & Islington?
SQL: SELECT "operator" FROM railway_station_schedule WHERE "destination" = 'Highbury & Islington'

Question: How many frequency figures are given for next station service pattern?
SQL: SELECT COUNT("frequency_per_hour") FROM railway_station_schedule WHERE "service_pattern" = 'Next station'

Question: Who is the operator to destination Dalston Junction?
SQL: SELECT "operator" FROM railway_station_schedule WHERE "destination" = 'Dalston Junction'