CREATE TABLE "2001_2100" (
  "ngc_number" real,
  "object_type" text,
  "constellation" text,
  "right_ascension_j2000" text,
  "declination_j2000" text
);

Question: What is the average NGC number of everything with a Right ascension (J2000) of 05h33m30s?
SQL: SELECT AVG("ngc_number") FROM "2001_2100" WHERE "right_ascension_j2000"='05h33m30s';

Question: What is the right ascension (J2000) with a Declination (J2000) of °12′43″, is a constellation of dorado, and has an NGC number larger than 2068?
SQL: SELECT "right_ascension_j2000" FROM "2001_2100" WHERE "ngc_number">2068 AND "constellation"='dorado' AND "declination_j2000"='°12′43″';

Question: What type of object has an NGC number higher than 2090 and has a right ascension (J2000) of 05h52m19s?
SQL: SELECT "object_type" FROM "2001_2100" WHERE "ngc_number">2090 AND "right_ascension_j2000"='05h52m19s';