Which single was on the Charts for 23 weeks ?
CREATE TABLE "singles" (
  "title" text,
  "entered_chart_uk" text,
  "peak_position_uk" real,
  "weeks_on_chart_uk" real,
  "sent_to_c_beebies_album" text
);
SELECT "title" FROM "singles" WHERE "weeks_on_chart_uk"=23;