Name number of stellar classification for 3 neptune planets < 1 au
CREATE TABLE "sun_like_stars_with_hot_dust_disks" (
  "star" text,
  "stellar_classification" text,
  "distance_from_earth_ly" text,
  "constellation" text,
  "dust_or_debris_temperature_k" text,
  "system" text,
  "dust_or_debris_location_au" text,
  "cool_dust_10_au" text,
  "stellar_age_myr" text
);
SELECT COUNT("stellar_classification") FROM "sun_like_stars_with_hot_dust_disks" WHERE "system"='3 Neptune planets < 1 AU';