CREATE TABLE "defunct_callsigns" (
  "callsign" text,
  "area_served" text,
  "frequency" text,
  "band" text,
  "on_air_id" text,
  "purpose" text
);

Question: Name the area served for on-air ID of abc canberra
SQL: SELECT "area_served" FROM "defunct_callsigns" WHERE "on_air_id"='abc canberra';

Question: Name the frequency with on-air ID of 1way fm
SQL: SELECT "frequency" FROM "defunct_callsigns" WHERE "on_air_id"='1way fm';

Question: Name the purpose for on-air ID of 2xx
SQL: SELECT "purpose" FROM "defunct_callsigns" WHERE "on_air_id"='2xx';

Question: Name the frequency for community purpose and callsign of 1vfm
SQL: SELECT "frequency" FROM "defunct_callsigns" WHERE "purpose"='community' AND "callsign"='1vfm';

Question: Name the band with frequency of 102.3
SQL: SELECT "band" FROM "defunct_callsigns" WHERE "frequency"='102.3';