Table: ngc_objects_3001_4000
Columns: ngc_number
object_type
constellation
right_ascension_j2000
declination_j2000
apparent_magnitude

Question: What is the sum of NGC numbers for Constellation vela?
SQL: SELECT SUM("ngc_number") FROM ngc_objects_3001_4000 WHERE "constellation" = 'vela'

Question: What is the Apparent magnitude of a globular cluster?
SQL: SELECT "apparent_magnitude" FROM ngc_objects_3001_4000 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 ngc_objects_3001_4000 WHERE "ngc_number" > 3293