What is the lowest Digital PSIP for channels over 29 with callsign CFTU-DT?
CREATE TABLE "television_stations" (
  "call_sign" text,
  "broadcast_channel" real,
  "digital_psip" real,
  "cable_channel" real,
  "network" text
);
SELECT MIN("digital_psip") FROM "television_stations" WHERE "call_sign"='cftu-dt' AND "broadcast_channel">29;