update README

.gitignore

@@ -1,3 +1,5 @@
 *.csv
 __pycache__
-testing_sql.txt
+testing_sql.txt
+EXCHANGE_CONFIG.json
+EXCHANGE_EXTRACT_SQL.json

README.md

@@ -10,6 +10,29 @@
 
 ### How To Run CMD:
 ###### pip3 install -r requirements.txt
+###### Create "EXCHANGE_CONFIG.json" & "EXCHANGE_EXTRACT_SQL.json" in the config file and input the config value
+###### Example:- EXCHANGE_CONFIG.json
+```
+{
+    "host"      :   "127.0.0.1",
+    "user"      :   "admin",
+    "password"  :   "admin",
+    "database"  :   "classicmodels"
+}
+```
+###### Example:- EXCHANGE_EXTRACT_SQL.json
+```
+{
+    "customers"    :   "SELECT * FROM customers;",
+    "employees"    :   "SELECT * FROM employees;",
+    "offices"      :   "SELECT * FROM offices;",
+    "orderdetails" :   "SELECT * FROM orderdetails;",
+    "orders"       :   "SELECT * FROM orders;",
+    "payments"     :   "SELECT * FROM payments;",
+    "productlines" :   "SELECT * FROM productlines;",
+    "products"     :   "SELECT * FROM products;"
+}
+```
 ###### python3 main.py
 
 ```