Table: radio_stations_wa
Columns: callsign
area_served
frequency
band
on_air_id
purpose

Question: Band of am, and a Frequency of 0 846 has what purpose?
SQL: SELECT "purpose" FROM radio_stations_wa WHERE "band" = 'am' AND "frequency" = '0 846'

Question: Frequency of 100.1 has what on-air id?
SQL: SELECT "on_air_id" FROM radio_stations_wa WHERE "frequency" = '100.1'

Question: Callsign of 6nan has what purpose?
SQL: SELECT "purpose" FROM radio_stations_wa WHERE "callsign" = '6nan'

Question: Band of am, and a Callsign of 6wh has what purpose?
SQL: SELECT "purpose" FROM radio_stations_wa WHERE "band" = 'am' AND "callsign" = '6wh'

Question: Frequency of 0 864 has what callsign?
SQL: SELECT "callsign" FROM radio_stations_wa WHERE "frequency" = '0 864'