Question: What is the sum of NGC numbers for Constellation Vela?
SQL: SELECT SUM("NGC number") FROM "2-11097691-3" WHERE "Constellation" = 'Vela';

Question: What is the Apparent magnitude of a Globular cluster?
SQL: SELECT "Apparent magnitude" FROM "2-11097691-3" WHERE "Object type" = 'Globular cluster';

Question: What is the total of Apparent magnitudes for an NGC number larger than 3293?
SQL: SELECT SUM("Apparent magnitude") FROM "2-11097691-3" WHERE "NGC number" > 3293.0;