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

Question: what Area has the frequency of 100.3 and an On-air ID of yass fm?
SQL: SELECT "area_served" FROM "defunct_callsigns" WHERE "frequency"='100.3' AND "on_air_id"='yass fm';

Question: What is the Callsign with an Area of tamworth and frequency of 0 88.9?
SQL: SELECT "callsign" FROM "defunct_callsigns" WHERE "area_served"='tamworth' AND "frequency"='0 88.9';

Question: What is the Purpose of the Area Braidwood?
SQL: SELECT "purpose" FROM "defunct_callsigns" WHERE "area_served"='braidwood';

Question: What Band has a Frequency of 0 99.7 in the Area of Newcastle?
SQL: SELECT "band" FROM "defunct_callsigns" WHERE "frequency"='0 99.7' AND "area_served"='newcastle';

Question: What is the Frequency of Gosford when the Callsign of 2cfm?
SQL: SELECT "frequency" FROM "defunct_callsigns" WHERE "area_served"='gosford' AND "callsign"='2cfm';

Question: What is the On-air ID with the frequency of 105.9, and purpose of commercial?
SQL: SELECT "on_air_id" FROM "defunct_callsigns" WHERE "frequency"='105.9' AND "purpose"='commercial';