diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5911997
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+db.py
diff --git a/__pycache__/db.cpython-39.pyc b/__pycache__/db.cpython-39.pyc
new file mode 100644
index 0000000..fc6e4c0
Binary files /dev/null and b/__pycache__/db.cpython-39.pyc differ
diff --git a/app.py b/app.py
index e293225..a668fb3 100644
--- a/app.py
+++ b/app.py
@@ -1 +1,41 @@
-# Your DB Code Here
+from db import DB_USERNAME, DB_PWD, URL_LINK
+import pymongo
+URL = URL_LINK.format(
+    DB_USERNAME, DB_PWD)
+print(URL)
+client = pymongo.MongoClient(URL)
+db = client["Bookstore"]
+
+pipeline = [{"$group": {"_id": "$isbn", "number_of_entries": {"$sum":1}}}]
+result = db.books_selling_data.aggregate(pipeline)
+#for books in result:
+#    print(books)
+
+pipeline = [{"$group": {"_id": "$isbn", "total_copies_sold": {"$sum":"$copies_sold"}}}, 
+            {"$match": {"total_copies_sold":{"$gt":15000}}},
+            {"$lookup": {"from": "books", "localField": "_id", "foreignField": "isbn", "as": "details"}},
+            {"$project": {"_id":0, "details":{"title": 1}}}]
+result = db.books_selling_data.aggregate(pipeline)
+#for books in result:
+#    print(books)
+
+pipeline = [{"$match": {"author": "John Doe"}},
+            {"$sort": {"isbn": 1}},
+            {"$project": {"_id": 0, "isbn": 0}}]
+result = db.books.aggregate(pipeline)
+#for books in result:
+#    print(books)
+
+pipeline = [{"$addFields": {"price_per_book": {"$round": [{"$divide": [{"$toInt": "$total_price"}, {"$toInt": "$copies_sold"}]}, 2]}}},
+            {"$project": {"_id":0, 'copies_sold': 0, 'total_price': 0, 'supplier': 0}}]
+result = db.books_selling_data.aggregate(pipeline)
+#for books in result:
+#    print(books)
+
+pipeline = [{"$unwind": "$supplier"}, 
+            {"$match": {"supplier": "titan"}},
+            {"$addFields": {"price_per_book": {"$round": [{"$divide": [{"$toInt": "$total_price"}, {"$toInt": "$copies_sold"}]}, 2]}}},
+            {"$project": {"_id":0, 'copies_sold': 0, 'total_price': 0, 'supplier': 0}}]
+result = db.books_selling_data.aggregate(pipeline)
+#for books in result:
+#    print(books)
diff --git a/tempCodeRunnerFile.py b/tempCodeRunnerFile.py
new file mode 100644
index 0000000..67a17ee
--- /dev/null
+++ b/tempCodeRunnerFile.py
@@ -0,0 +1,2 @@
+
+            {"$addFields": {"price_per_book": {"$divide": [int("$total_price"), int("$copies_sold"
\ No newline at end of file