=== complexes ===
  ulb_id - Null: NO, Default: 
  ward_id - Null: NO, Default: 
  zone_id - Null: YES, Default: 
=== units_galas ===
  ulb_id - Null: NO, Default: 
  ward_id - Null: NO, Default: 
  complex_id - Null: NO, Default: 
  building_id - Null: NO, Default: 
  floor_id - Null: NO, Default: 
=== buildings ===
  complex_id - Null: NO, Default: 
=== floors ===
  building_id - Null: NO, Default: