CREATE TABLE table_name_28 (ngc_number NUMBER, declination___j2000__ VARCHAR2, apparent_magnitude VARCHAR2)

What's the total number of NGC that has a Declination ( J2000 ) of 15 55 , and an Apparent magnitude greater than 10?
SELECT SUM(ngc_number) FROM table_name_28 WHERE declination___j2000__ = "°15′55″" AND apparent_magnitude > 10
SELECT SUM("ngc_number") FROM "table_name_28" WHERE "apparent_magnitude" > 10 AND "declination___j2000__" = "°15′55″"