diff --git a/src/nn.py b/src/nn.py
new file mode 100644
index 0000000..d58087f
--- /dev/null
+++ b/src/nn.py
@@ -0,0 +1,28 @@
+import tensorflow as tf
+import pandas as pd
+
+
+mnist = tf.keras.datasets.mnist
+
+(x_train, y_train), (x_test, y_test) = mnist.load_data()
+x_train, x_test = x_train / 255.0, x_test / 255.0
+
+model = tf.keras.Sequential([
+        tf.keras.layers.Flatten(input_shape=(28, 28)),
+        tf.keras.layers.Dense(128, activation='relu'),
+])
+
+loss_fn = tf.keras.losses.SparseCategoricalCrossentropy(from_logits=True)
+
+model.compile(optimizer='adam',
+              loss=loss_fn,
+              metrics=['accuracy'])
+
+model.fit(x_train, y_train, epochs=10, batch_size=1024)
+
+my_first_model_path = './model/'
+tf.saved_model.save(model, my_first_model_path)
+
+new_model = tf.saved_model.load(my_first_model_path)
+
+print(model)
\ No newline at end of file
diff --git a/utils/oracle_database.py b/utils/oracle_database.py
index 0b356e0..c9e7b18 100644
--- a/utils/oracle_database.py
+++ b/utils/oracle_database.py
@@ -1,4 +1,3 @@
-import cx_Oracle
 import yaml
 import os
 from pathlib import Path
@@ -10,7 +9,8 @@ def process_yaml():
 	with open("../config.yaml") as file:
 		return yaml.safe_load(file)
 
-
+# deprecated class due to old cx_Oracle library, new one is oracledb and implemented below.
+'''
 class OracleJSONDatabaseConnection:
     def __init__(self, data=process_yaml()):
         # wallet location (default is HOME/wallets/wallet_X)
@@ -76,7 +76,7 @@ def get_collection_names(self):
         returning_object = connection.getSodaDatabase().getCollectionNames(startName=None, limit=0)
         self.pool.release(connection)
         return returning_object
-
+'''
 
 
 
@@ -87,13 +87,11 @@ def __init__(self, data=process_yaml()):
         print('Connection successful.')
 
 
-
     def close_pool(self):
         self.pool.close()
         print('Connection pool closed.')
 
 
-
     def insert(self, collection_name, json_object_to_insert):
         connection = self.pool.acquire()
         connection.autocommit = True
@@ -110,7 +108,6 @@ def insert(self, collection_name, json_object_to_insert):
         return 1
 
 
-
     def delete(self, collection_name, on_column, on_value):
         connection = self.pool.acquire()
         connection.autocommit = True
@@ -121,19 +118,16 @@ def delete(self, collection_name, on_column, on_value):
         self.pool.release(connection)
 
 
-
     def get_connection(self):
         connection = self.pool.acquire()
         connection.autocommit = True
         return connection
 
 
-
     def close_connection(self, conn_object):
         self.pool.release(conn_object)
 
 
-
     def get_collection_names(self):
         connection = self.pool.acquire()
         connection.autocommit = True
@@ -141,6 +135,13 @@ def get_collection_names(self):
         self.pool.release(connection)
         return returning_object
 
+    def open_collection(self, collection_name):
+        connection = self.pool.acquire()
+        returning_object = self.pool.acquire().getSodaDatabase().openCollection(collection_name)
+        self.pool.release(connection)
+        return returning_object
+
+
 
 
 
@@ -153,13 +154,11 @@ def __init__(self, data=process_yaml()):
         print('Connection successful.')
 
 
-
     def close_pool(self):
         self.pool.close()
         print('Connection pool closed.')
 
 
-
     def insert(self, collection_name, json_object_to_insert):
         connection = self.pool.acquire()
         connection.autocommit = True
@@ -175,8 +174,6 @@ def insert(self, collection_name, json_object_to_insert):
         self.pool.release(connection)
         return 1
 
-
-
     def delete(self, collection_name, on_column, on_value):
         connection = self.pool.acquire()
         connection.autocommit = True
@@ -187,19 +184,16 @@ def delete(self, collection_name, on_column, on_value):
         self.pool.release(connection)
 
 
-
     def get_connection(self):
         connection = self.pool.acquire()
         connection.autocommit = True
         return connection
 
 
-
     def close_connection(self, conn_object):
         self.pool.release(conn_object)
 
 
-
     def get_collection_names(self):
         connection = self.pool.acquire()
         connection.autocommit = True
@@ -208,9 +202,16 @@ def get_collection_names(self):
         return returning_object
 
 
+    def open_collection(self, collection_name):
+        connection = self.pool.acquire()
+        returning_object = self.pool.acquire().getSodaDatabase().openCollection(collection_name)
+        self.pool.release(connection)
+        return returning_object
+
+
 
 def test_class():
-    object = OracleJSONDatabaseConnection()
+    object = OracleJSONDatabaseThickConnection()
     print(object.pool)
     object.close_pool()