How many oricon's have a romaji title of rakuen -memorial tracks- (maxi-single)?
CREATE TABLE "singles" (
  "romaji_title" text,
  "japanese_title" text,
  "release_date" text,
  "reference" text,
  "oricon" real
);
SELECT COUNT("oricon") FROM "singles" WHERE "romaji_title"='rakuen -memorial tracks- (maxi-single)';