mysql> select id, name, label, option_group_id FROM civicrm_custom_field WHERE id = 16;
+----+-------------------+-------------------+-----------------+
| id | name              | label             | option_group_id |
+----+-------------------+-------------------+-----------------+
| 16 | NSA_Qualification | NSA Qualification |            NULL |
+----+-------------------+-------------------+-----------------+
1 row in set (0.00 sec)

mysql>