diff --git a/modules/app_sql.py b/modules/app_sql.py
index 5a6bb6c..7400822 100644
--- a/modules/app_sql.py
+++ b/modules/app_sql.py
@@ -1,14 +1,75 @@
-import csv, os
+import sqlite3
 import app_obd, app_car, app_account, app_gps
 from datetime import datetime
+from sqlite3 import Error
 
-currentday = datetime.today().strftime("%d%m%Y")
-currenttime = datetime.now().strftime("%H_%M_%S")
+currentdatetime = datetime.now()
 account = app_account.Account
 car = app_car.Car
 sCarModel = ''.join(letter for letter in car.model if letter.isalnum())
-sql_name = account.name + "_" + sCarModel + "_" + currentday + ".sql"
-sql_path = "../db/sql/"
+sql_file = account.name + "_" + sCarModel + ".db"
+sql_path = "../db/sql/" + sql_file
+
+def create_conn(db_file):
+    conn = None
+    try:
+        conn = sqlite3.connect(db_file)
+        print(sqlite3.version)
+    except Error as e:
+        print(e)
+    finally:
+        if conn:
+            conn.close()
+
+def create_table(conn, create_table_sql):
+    """ create a table from the create_table_sql statement
+    :param conn: Connection object
+    :param create_table_sql: a CREATE TABLE statement
+    :return:
+    """
+    try:
+        c = conn.cursor()
+        c.execute(create_table_sql)
+    except Error as e:
+        print(e)
+
+def main():
+    db = sql_path
+
+    sql_create_tracking_table = """CREATE TABLE IF NOT EXISTS tracking (
+                                    id integer PRIMARY KEY,
+                                    VN text NOT NULL,
+                                    NAME text NOT NULL,
+                                    DATETIME datetime,
+                                    GPSX float,
+                                    GPSY float,
+                                    SPEED float,
+                                    ODOMETER float
+                                );"""
+    
+    sql_create_dtc_table = """CREATE TABLE IF NOT EXISTS dtc (
+                                    id integer PRIMARY KEY,
+                                    NAME text NOT NULL,
+                                    STATUS text,
+                                    DTC_ID text
+                                );"""
+
+    # create a database connection
+    conn = create_conn(db)
+
+    # create tables
+    if conn is not None:
+        # create diagnostics table
+        create_table(conn, sql_create_tracking_table)
+
+        # create diagnostics table
+        create_table(conn, sql_create_dtc_table)
+
+    else:
+        print("Error! cannot create the database connection.")
+
+if __name__ == '__main__':
+    create_conn(sql_path)