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

Question: What is 4zr's callsign?
SQL: SELECT "callsign" FROM "notes" WHERE "on_air_id"='4zr';

Question: What is the On-air ID of the broadcaster at frequency 0 801?
SQL: SELECT "on_air_id" FROM "notes" WHERE "frequency"='0 801';

Question: 4tab of commercial broadcaster Radio Tab broadcasts at what frequency?
SQL: SELECT "frequency" FROM "notes" WHERE "purpose"='commercial' AND "on_air_id"='radio tab' AND "callsign"='4tab';

Question: What band does 4cca use?
SQL: SELECT "band" FROM "notes" WHERE "callsign"='4cca';

Question: What is the On-air ID of FM broadcaster 4nsa?
SQL: SELECT "on_air_id" FROM "notes" WHERE "band"='fm' AND "callsign"='4nsa';

Question: The community station broadcasting at frequency 0 96.9 is in what band?
SQL: SELECT "band" FROM "notes" WHERE "purpose"='community' AND "frequency"='0 96.9';