Question: What is the average NGC number of everything with a Right ascension (J2000) of 05h33m30s?
SQL: SELECT AVG("NGC number") FROM "2-11097664-1" 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 "2-11097664-1" WHERE "NGC number" > 2068.0 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 "2-11097664-1" WHERE "NGC number" > 2090.0 AND "Right ascension ( J2000 )" = '05h52m19s';