diff --git a/backend/crud/charts_crud.py b/backend/crud/charts_crud.py
index 6484ec2..32e89d4 100644
--- a/backend/crud/charts_crud.py
+++ b/backend/crud/charts_crud.py
@@ -8,5 +8,12 @@ def get_charts(db: Session):
     차트 정보 불러오는 API
     :param db:
     :return: fish_type, count(fish_id)
+    아무것도 없을시 0으로 반환
     """
-    return db.query(Fish.fish_type,func.count(History.fish_id)).group_by(History.fish_id).join(Fish,History.fish_id == Fish.fish_id)
+    # create an alias for the right table
+    # right_table = aliased(Fish)
+
+    # perform the right join
+    # query = db.query(LeftTable).join(right_table, LeftTable.id == right_table.left_id, isouter=True)
+
+    return db.query(Fish.fish_type,func.count(History.fish_id)).group_by(Fish.fish_type).group_by(History.fish_id).outerjoin(History,History.fish_id == Fish.fish_id)
diff --git a/backend/database.py b/backend/database.py
index 7c6044a..d914a46 100644
--- a/backend/database.py
+++ b/backend/database.py
@@ -1,11 +1,28 @@
 from sqlalchemy import create_engine
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker
+import socket
 
 import os
 
+
 SQLALCHEMY_DATABASE_URL = "mysql+pymysql://taegong:taegong@172.17.0.1:3306/taegong"
 
+try:
+    hostname = socket.gethostname()
+    # Get the IP address
+    ip_address = socket.gethostbyname(hostname)
+    if ip_address == "127.0.0.1":
+        print("Running on localhost.")
+        SQLALCHEMY_DATABASE_URL = "mysql+pymysql://taegong:taegong@localhost:3306/taegong"
+    else:
+        print("the docker container ip is:",ip_address)
+except:
+    print("Could not determine if running on localhost or in a Docker container.")
+
+
+
+
 engine = create_engine(
     SQLALCHEMY_DATABASE_URL,
     # connect_args={"check_same_thread": False}
diff --git a/backend/test/__init__.py b/backend/test/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/test/test_charts_crud.py b/backend/test/test_charts_crud.py
new file mode 100644
index 0000000..64ed052
--- /dev/null
+++ b/backend/test/test_charts_crud.py
@@ -0,0 +1,41 @@
+import unittest
+from unittest.mock import MagicMock
+from crud import charts_crud
+from fastapi.testclient import TestClient
+from fastapi import FastAPI, HTTPException
+from unittest.mock import MagicMock
+from main import app
+
+
+
+class MyTestCase(unittest.TestCase):
+
+    def get_db(self):
+        """
+        Fake 데이터 베이스
+        :return:
+        """
+        # Create a fake database object
+        db = MagicMock()
+        # Add some test data
+        items = [{"id": 1, "name": "Item 1"}]
+        db.query.return_value.filter.return_value.first.side_effect = items
+        return db
+
+    def test_charts_crud(self):
+        """
+        차트 정보 불러오는 API 테스트
+        현재 데이터 베이스에 있는 데이터를 불러오는지 확인
+        :return: 모든 Fish_type
+        history에 fish_type이 없을시 0으로 반환
+        """
+        # db = self.get_db()
+        client = TestClient(app)
+
+        response = client.get("http://0.0.0.0:8000/api/charts")
+        assert response.status_code == 200
+        assert response.json() ==  {'고등어': 0, '넙치': 5, '노랑 가오리': 11, '볼락': 3, '적색퉁돔': 5}
+
+
+if __name__ == '__main__':
+    unittest.main()