diff --git a/.gitignore b/.gitignore
index 8edced5..9f831ba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@
 **/__pycache__/
 **/.idea/
 ./dist
+./cerc_persistence.egg-info
\ No newline at end of file
diff --git a/cerc_persistence/__init__.py b/cerc_persistence/__init__.py
index e69de29..2fb3351 100644
--- a/cerc_persistence/__init__.py
+++ b/cerc_persistence/__init__.py
@@ -0,0 +1,3 @@
+"""
+Repositories Package
+"""
diff --git a/cerc_persistence/db_control.py b/cerc_persistence/db_control.py
index 521c368..49c187b 100644
--- a/cerc_persistence/db_control.py
+++ b/cerc_persistence/db_control.py
@@ -4,7 +4,6 @@ SPDX - License - Identifier: LGPL - 3.0 - or -later
 Copyright © 2022 Concordia CERC group
 Project CoderPeter Yefi peteryefi@gmail.com
 """
-import json
 from typing import Dict
 
 from cerc_persistence.repositories.application import Application
@@ -74,10 +73,10 @@ class DBControl:
     :
     """
     cities = self._city.get_by_user_id_application_id_and_scenario(user_id, application_id, scenario)
-    for city in cities:
-      result = self.building_info(name, city[0].id)
-      if result is not None:
-        return result
+    city = [city[0].id for city in cities]
+    result = self._city_object.building_in_cities_info(name, city)
+    if result is not None:
+      return result
     return None
 
   def building_info(self, name, city_id) -> CityObject:
@@ -89,17 +88,14 @@ class DBControl:
     """
     return self._city_object.get_by_name_or_alias_and_city(name, city_id)
 
-  def buildings_info(self, request_values, city_id) -> [CityObject]:
+  def building_info_in_cities(self, name, cities) -> CityObject:
     """
-    Retrieve the buildings info from the database
-    :param request_values: Building names
-    :param city_id: City ID
-    :return: [CityObject]
+    Retrieve the building info from the database
+    :param name: Building name
+    :param cities: [City ID]
+    :return: CityObject
     """
-    buildings = []
-    for name in request_values['names']:
-      buildings.append(self.building_info(name, city_id))
-    return buildings
+    return self._city_object.get_by_name_or_alias_in_cities(name, cities)
 
   def results(self, user_id, application_id, request_values, result_names=None) -> Dict:
     """
@@ -121,24 +117,21 @@ class DBControl:
         )
         if result_sets is None:
           continue
-        for result_set in result_sets:
-          city_id = result_set[0].id
+        results[scenario_name] = []
+        city_ids = [r[0].id for r in result_sets]
+        for building_name in scenario[scenario_name]:
+          _building = self._city_object.get_by_name_or_alias_in_cities(building_name, city_ids)
+          if _building is None:
+            continue
+          city_object_id = _building.id
+          _ = self._simulation_results.get_simulation_results_by_city_object_id_and_names(
+            city_object_id,
+            result_names)
 
-          results[scenario_name] = []
-          for building_name in scenario[scenario_name]:
-            _building = self._city_object.get_by_name_or_alias_and_city(building_name, city_id)
-            if _building is None:
-              continue
-            city_object_id = _building.id
-            _ = self._simulation_results.get_simulation_results_by_city_id_city_object_id_and_names(
-              city_id,
-              city_object_id,
-              result_names)
-
-            for value in _:
-              values = json.loads(value.values)
-              values["building"] = building_name
-              results[scenario_name].append(values)
+          for value in _:
+            values = value.values
+            values["building"] = building_name
+            results[scenario_name].append(values)
     return results
 
   def persist_city(self, city: City, pickle_path, scenario, application_id: int, user_id: int):
@@ -151,7 +144,7 @@ class DBControl:
     :param user_id: User who create the city
     return identity_id
     """
-    return self._city.insert(city, pickle_path, scenario, application_id, user_id)
+    return self._city.insert(city, pickle_path, scenario,  application_id, user_id)
 
   def update_city(self, city_id, city):
     """
diff --git a/cerc_persistence/db_setup.py b/cerc_persistence/db_setup.py
index 495f3ee..3b76fe1 100644
--- a/cerc_persistence/db_setup.py
+++ b/cerc_persistence/db_setup.py
@@ -50,14 +50,14 @@ class DBSetup:
     name = 'AdminTool'
     description = 'Admin tool to control city persistence and to test the API v1.4'
     logging.info('Creating default admin tool application...')
-    application_id = application_repo.insert(name, description, application_uuid)
+    application = application_repo.insert(name, description, application_uuid)
 
-    if isinstance(application_id, dict):
-      logging.info(application_id)
+    if isinstance(application, dict):
+      logging.info(application)
     else:
       msg = f'Created Admin tool with application_uuid: {application_uuid}'
       logging.info(msg)
-    return application_id
+    return application.id
 
   @staticmethod
   def _create_admin_user(user_repo, admin_password, application_id):
diff --git a/cerc_persistence/models/city_object.py b/cerc_persistence/models/city_object.py
index d245c93..0b602a3 100644
--- a/cerc_persistence/models/city_object.py
+++ b/cerc_persistence/models/city_object.py
@@ -50,8 +50,7 @@ class CityObject(Models):
     self.volume = building.volume
     self.area = building.floor_area
     self.roof_area = sum(roof.solid_polygon.area for roof in building.roofs)
-    self.total_pv_area = sum(
-      roof.solid_polygon.area * roof.solar_collectors_area_reduction_factor for roof in building.roofs)
+    self.total_pv_area = sum(roof.solid_polygon.area * roof.solar_collectors_area_reduction_factor for roof in building.roofs)
     storeys = building.storeys_above_ground
     wall_area = 0
     window_ratio = 0
diff --git a/cerc_persistence/repositories/__init__.py b/cerc_persistence/repositories/__init__.py
index e9bec62..2fb3351 100644
--- a/cerc_persistence/repositories/__init__.py
+++ b/cerc_persistence/repositories/__init__.py
@@ -1,10 +1,3 @@
 """
 Repositories Package
 """
-import datetime
-import logging
-
-from sqlalchemy import select
-from sqlalchemy.exc import SQLAlchemyError
-from sqlalchemy.orm import Session
-from cerc_persistence.repository import Repository
diff --git a/cerc_persistence/repositories/application.py b/cerc_persistence/repositories/application.py
index 3ca672b..a3c3597 100644
--- a/cerc_persistence/repositories/application.py
+++ b/cerc_persistence/repositories/application.py
@@ -4,8 +4,16 @@ SPDX - License - Identifier: LGPL - 3.0 - or -later
 Copyright © 2022 Concordia CERC group
 Project Coder Guille Gutierrez Guillermo.GutierrezMorote@concordia.ca
 """
+
+import datetime
+import logging
+
+from sqlalchemy import select
+from sqlalchemy.exc import SQLAlchemyError
+from sqlalchemy.orm.session import Session
+
+from cerc_persistence.repository import Repository
 from cerc_persistence.models import Application as Model
-from . import datetime, logging, select, SQLAlchemyError, Session, Repository
 
 
 class Application(Repository):
diff --git a/cerc_persistence/repositories/city.py b/cerc_persistence/repositories/city.py
index e0686aa..bc9bdab 100644
--- a/cerc_persistence/repositories/city.py
+++ b/cerc_persistence/repositories/city.py
@@ -4,11 +4,18 @@ SPDX - License - Identifier: LGPL - 3.0 - or -later
 Copyright © 2022 Concordia CERC group
 Project Coder Peter Yefi peteryefi@gmail.com
 """
-from hub.city_model_structure.city import City as CityHub
+import datetime
+import logging
+
+from sqlalchemy import select
+from sqlalchemy.exc import SQLAlchemyError
+from sqlalchemy.orm import Session
+
 from hub.version import __version__
+from hub.city_model_structure.city import City as CityHub
+from cerc_persistence.repository import Repository
 from cerc_persistence.models import City as Model
 from cerc_persistence.models import CityObject
-from . import datetime, logging, select, SQLAlchemyError, Session, Repository
 
 
 class City(Repository):
@@ -33,7 +40,7 @@ class City(Repository):
     Inserts a city
     :param city: The complete city instance
     :param pickle_path: Path to the pickle
-    :param scenario: Simulation scenario name
+    param scenario: Simulation scenario name
     :param application_id: Application id owning the instance
     :param user_id: User id owning the instance
     :return: Identity id
diff --git a/cerc_persistence/repositories/city_object.py b/cerc_persistence/repositories/city_object.py
index afc7542..2521d8e 100644
--- a/cerc_persistence/repositories/city_object.py
+++ b/cerc_persistence/repositories/city_object.py
@@ -4,9 +4,17 @@ SPDX - License - Identifier: LGPL - 3.0 - or -later
 Copyright © 2022 Concordia CERC group
 Project Coder Guille Gutierrez Guillermo.GutierrezMorote@concordia.ca
 """
+import datetime
+import logging
+from typing import Union
+
 from hub.city_model_structure.building import Building
+from sqlalchemy import select
+from sqlalchemy.exc import SQLAlchemyError
+from sqlalchemy.orm import Session
+
 from cerc_persistence.models import CityObject as Model
-from . import datetime, logging, select, SQLAlchemyError, Session, Repository
+from cerc_persistence.repository import Repository
 
 
 class CityObject(Repository):
@@ -65,7 +73,7 @@ class CityObject(Repository):
       with Session(self.engine) as session:
         session.query(Model).filter(Model.name == building.name, Model.city_id == city_id).update(
           {'name': building.name,
-           'alias': building.alias,
+           'aliases': building.aliases,
            'object_type': building.type,
            'year_of_construction': building.year_of_construction,
            'function': building.function,
@@ -90,10 +98,44 @@ class CityObject(Repository):
         session.query(Model).filter(Model.city_id == city_id, Model.name == name).delete()
         session.commit()
     except SQLAlchemyError as err:
-      logging.error('Error while deleting city_object %s', err)
+      logging.error('Error while deleting city object %s', err)
       raise SQLAlchemyError from err
 
-  def get_by_name_or_alias_and_city(self, name, city_id) -> Model:
+  def building_in_cities_info(self, name, cities):
+    """
+    Fetch a city object based on name and city id
+    :param name: city object name
+    :param cities: city identifiers
+    :return: [CityObject] with the provided name or alias belonging to the city with id city_id
+    """
+    try:
+      # search by name first
+      with Session(self.engine) as session:
+        city_object = session.execute(select(Model).where(
+          Model.name == name, Model.city_id.in_(cities))
+        ).first()
+        if city_object is not None:
+          return city_object[0]
+        # name not found, so search by alias instead
+        city_objects = session.execute(
+          select(Model).where(Model.aliases.contains(name), Model.city_id.in_(cities))
+        ).all()
+      for city_object in city_objects:
+        aliases = city_object[0].aliases.replace('{', '').replace('}', '').split(',')
+        for alias in aliases:
+          if alias == name:
+            # force the name as the alias
+            city_object[0].name = name
+            return city_object[0]
+      return None
+    except SQLAlchemyError as err:
+      logging.error('Error while fetching city object by name and city: %s', err)
+      raise SQLAlchemyError from err
+    except IndexError as err:
+      logging.error('Error while fetching city object by name and city, empty result %s', err)
+      raise IndexError from err
+
+  def get_by_name_or_alias_and_city(self, name, city_id) -> Union[Model, None]:
     """
     Fetch a city object based on name and city id
     :param name: city object name
@@ -124,3 +166,35 @@ class CityObject(Repository):
     except IndexError as err:
       logging.error('Error while fetching city object by name and city, empty result %s', err)
       raise IndexError from err
+
+  def get_by_name_or_alias_in_cities(self, name, city_ids) -> Model:
+    """
+    Fetch a city object based on name and city ids
+    :param name: city object name
+    :param city_ids: a list of city identifiers
+    :return: [CityObject] with the provided name or alias belonging to the city with id city_id
+    """
+    try:
+      # search by name first
+      with Session(self.engine) as session:
+        city_object = session.execute(select(Model).where(Model.name == name, Model.city_id.in_(tuple(city_ids)))).first()
+        if city_object is not None:
+          return city_object[0]
+        # name not found, so search by alias instead
+        city_objects = session.execute(
+          select(Model).where(Model.aliases.contains(name), Model.city_id.in_(tuple(city_ids)))
+        ).all()
+      for city_object in city_objects:
+        aliases = city_object[0].aliases.replace('{', '').replace('}', '').split(',')
+        for alias in aliases:
+          if alias == name:
+            # force the name as the alias
+            city_object[0].name = name
+            return city_object[0]
+      return None
+    except SQLAlchemyError as err:
+      logging.error('Error while fetching city object by name and city: %s', err)
+      raise SQLAlchemyError from err
+    except IndexError as err:
+      logging.error('Error while fetching city object by name and city, empty result %s', err)
+      raise IndexError from err
diff --git a/cerc_persistence/repositories/simulation_results.py b/cerc_persistence/repositories/simulation_results.py
index f8f0efd..f87e0be 100644
--- a/cerc_persistence/repositories/simulation_results.py
+++ b/cerc_persistence/repositories/simulation_results.py
@@ -4,11 +4,18 @@ SPDX - License - Identifier: LGPL - 3.0 - or -later
 Copyright © 2022 Concordia CERC group
 Project Coder Guille Gutierrez Guillermo.GutierrezMorote@concordia.ca
 """
+import datetime
+import logging
+
 from sqlalchemy import or_
+from sqlalchemy import select
+from sqlalchemy.exc import SQLAlchemyError
+from sqlalchemy.orm import Session
+
+from cerc_persistence.repository import Repository
 from cerc_persistence.models import City
 from cerc_persistence.models import CityObject
 from cerc_persistence.models import SimulationResults as Model
-from . import datetime, logging, select, SQLAlchemyError, Session, Repository
 
 
 class SimulationResults(Repository):
@@ -69,10 +76,10 @@ class SimulationResults(Repository):
       with Session(self.engine) as session:
         if city_id is not None:
           session.query(Model).filter(Model.name == name, Model.city_id == city_id).update(
-            {
-              'values': values,
-              'updated': datetime.datetime.utcnow()
-            })
+          {
+            'values': values,
+            'updated': datetime.datetime.utcnow()
+          })
           session.commit()
         elif city_object_id is not None:
           session.query(Model).filter(Model.name == name, Model.city_object_id == city_object_id).update(
@@ -84,7 +91,7 @@ class SimulationResults(Repository):
         else:
           raise NotImplementedError('Missing either city_id or city_object_id')
     except SQLAlchemyError as err:
-      logging.error('Error while updating simulation results %s', err)
+      logging.error('Error while updating simulation results for %s', err)
       raise SQLAlchemyError from err
 
   def delete(self, name: str, city_id=None, city_object_id=None):
@@ -135,8 +142,7 @@ class SimulationResults(Repository):
       logging.error('Error while fetching city by city_id: %s', err)
       raise SQLAlchemyError from err
 
-  def get_simulation_results_by_city_id_city_object_id_and_names(self, city_id, city_object_id,
-                                                                 result_names=None) -> [Model]:
+  def get_simulation_results_by_city_id_city_object_id_and_names(self, city_id, city_object_id, result_names=None) -> [Model]:
     """
     Fetch the simulation results based in the city_id or city_object_id with the given names or all
     :param city_id: the city id
@@ -161,3 +167,27 @@ class SimulationResults(Repository):
     except SQLAlchemyError as err:
       logging.error('Error while fetching city by city_id: %s', err)
       raise SQLAlchemyError from err
+
+  def get_simulation_results_by_city_object_id_and_names(self, city_object_id, result_names=None) -> [Model]:
+    """
+    Fetch the simulation results based in the city_object_id with the given names or all
+    :param city_object_id: the city object id
+    :param result_names: if given filter the results
+    :return: [SimulationResult]
+    """
+    try:
+      with Session(self.engine) as session:
+        result_set = session.execute(select(Model).where(
+          Model.city_object_id == city_object_id
+        ))
+        results = [r[0] for r in result_set]
+        if not result_names:
+          return results
+        filtered_results = []
+        for result in results:
+          if result.name in result_names:
+            filtered_results.append(result)
+        return filtered_results
+    except SQLAlchemyError as err:
+      logging.error('Error while fetching city by city_id: %s', err)
+      raise SQLAlchemyError from err
diff --git a/cerc_persistence/repositories/user.py b/cerc_persistence/repositories/user.py
index d4cc87f..75d3a0e 100644
--- a/cerc_persistence/repositories/user.py
+++ b/cerc_persistence/repositories/user.py
@@ -4,12 +4,16 @@ SPDX - License - Identifier: LGPL - 3.0 - or -later
 Copyright © 2022 Concordia CERC group
 Project Coder Peter Yefi peteryefi@gmail.com
 """
+import datetime
+import logging
 
+from sqlalchemy import select
+from sqlalchemy.exc import SQLAlchemyError
+from sqlalchemy.orm import Session
 
 from hub.helpers.auth import Auth
 from cerc_persistence.repository import Repository
 from cerc_persistence.models import User as Model, Application as ApplicationModel, UserRoles
-from . import datetime, logging, select, SQLAlchemyError, Session, Repository
 
 
 class User(Repository):
diff --git a/tests/test_db_factory.py b/tests/test_db_factory.py
index a89295a..7eff3d2 100644
--- a/tests/test_db_factory.py
+++ b/tests/test_db_factory.py
@@ -279,10 +279,8 @@ TestDBFactory
         {'yearly_cooling_consumption': yearly_cooling_consumption},
         {'monthly_domestic_hot_water_consumption': monthly_domestic_hot_water_consumption},
         {'yearly_domestic_hot_water_consumption': yearly_domestic_hot_water_consumption},
-        {
-          'monthly_distribution_systems_electrical_consumption': monthly_distribution_systems_electrical_consumption},
-        {
-          'yearly_distribution_systems_electrical_consumption': yearly_distribution_systems_electrical_consumption},
+        {'monthly_distribution_systems_electrical_consumption': monthly_distribution_systems_electrical_consumption},
+        {'yearly_distribution_systems_electrical_consumption': yearly_distribution_systems_electrical_consumption},
         {'monthly_on_site_electrical_production': monthly_on_site_electrical_production},
         {'yearly_on_site_electrical_production': yearly_on_site_electrical_production}
       ]})
diff --git a/tests/test_db_retrieve.py b/tests/test_db_retrieve.py
index c072939..161d766 100644
--- a/tests/test_db_retrieve.py
+++ b/tests/test_db_retrieve.py
@@ -4,6 +4,7 @@ SPDX - License - Identifier: LGPL - 3.0 - or -later
 Copyright © 2022 Concordia CERC group
 Project Coder Ruben Sanchez ruben.sanchez@mail.concordia.ca
 """
+import datetime
 import distutils.spawn
 import logging
 import os
@@ -114,21 +115,13 @@ class TestDBFactory(TestCase):
 
   @unittest.skipIf(control.skip_test, control.skip_reason)
   def test_retrieve_results(self):
+    datetime.datetime.now()
     request_values = {
       "scenarios": [
-        {
-          "current status": ["01002777", "01002773", "01036804"]
-        },
-        {
-          "skin retrofit": ["01002777", "01002773", "01036804"]
-        },
-        {
-          "system retrofit and pv": ["01002777", "01002773", "01036804"]
-        },
-        {
-          "skin and system retrofit with pv": ["01002777", "01002773", "01036804"]
-        }
-
+        {"current status": ["01002777", "01002773", "01036804"]},
+        {"skin retrofit": ["01002777", "01002773", "01036804"]},
+        {"system retrofit and pv": ["01002777", "01002773", "01036804"]},
+        {"skin and system retrofit with pv": ["01002777", "01002773", "01036804"]}
       ]
     }
     results = control.database.results(control.user_id, control.application_id, request_values)