ALTER TABLE buildings DROP COLUMN IF EXISTS typology_classification; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_classification_source_type; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_classification_source_links; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_style_period; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_style_period_source_type; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_style_period_source_links; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_dynamic_classification; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_dynamic_classification_source_type; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_dynamic_classification_source_links; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_original_use; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_original_use_source_type; ALTER TABLE buildings DROP COLUMN IF EXISTS typology_original_use_source_links; ALTER TABLE buildings DROP COLUMN IF EXISTS building_attachment_source_type; ALTER TABLE buildings DROP COLUMN IF EXISTS building_attachment_source_links;