Added data connection examples to Python sheet.

python.md

@@ -15,6 +15,17 @@
 11. [File Handling](#file-handling)
 12. [Exception Handling](#exception-handling)
 13. [Classes and Objects](#classes-and-objects)
+14. [SQLite3 Database Connection](#sqlite3-database-connection)
+   14.1 [Connecting to a Database](#connecting-to-a-database)
+   14.2 [Creating a Table](#creating-a-table)
+   14.3 [Inserting Data](#inserting-data)
+   14.4 [Querying Data](#querying-data)
+   14.5 [Updating Data](#updating-data)
+   14.6 [Deleting Data](#deleting-data)
+   14.7 [Closing the Connection](#closing-the-connection)
+15. [JSON Data Connection](#json-data-connection)
+   15.1 [Loading JSON Data](#loading-json-data)
+   15.2 [Writing JSON Data](#writing-json-data)
 
 ## Variables
 
@@ -214,5 +225,123 @@ obj = MyClass("John")
 obj.say_hello()  # Outputs: Hello, John!
 ```
 
+## Working with Data
+
+```python
+# Import necessary modules
+import sqlite3
+import json
 ```
 
+## 14. SQLite3 Database Connection
+
+### 14.1 Connecting to a Database
+
+```python
+# Connect to a database (creates a new database if it doesn't exist)
+conn = sqlite3.connect('example.db')
+
+# Create a cursor object to execute SQL commands
+cursor = conn.cursor()
+```
+
+### 14.2 Creating a Table
+
+```python
+# Create a table
+cursor.execute('''
+    CREATE TABLE IF NOT EXISTS users (
+        id INTEGER PRIMARY KEY,
+        username TEXT NOT NULL,
+        email TEXT NOT NULL
+    )
+''')
+
+# Commit the changes
+conn.commit()
+```
+
+### 14.3 Inserting Data
+
+```python
+# Insert data into the table
+cursor.execute('''
+    INSERT INTO users (username, email)
+    VALUES ('john_doe', 'john@example.com')
+''')
+
+# Commit the changes
+conn.commit()
+```
+
+### 14.4 Querying Data
+
+```python
+# Fetch all rows from the table
+cursor.execute('SELECT * FROM users')
+rows = cursor.fetchall()
+
+# Print the results
+for row in rows:
+    print(row)
+```
+
+### 14.5 Updating Data
+
+```python
+# Update data in the table
+cursor.execute('''
+    UPDATE users
+    SET email = 'john.doe@example.com'
+    WHERE username = 'john_doe'
+''')
+
+# Commit the changes
+conn.commit()
+```
+
+### 14.6 Deleting Data
+
+```python
+# Delete data from the table
+cursor.execute('''
+    DELETE FROM users
+    WHERE username = 'john_doe'
+''')
+
+# Commit the changes
+conn.commit()
+```
+
+### 14.7 Closing the Connection
+
+```python
+# Close the cursor and connection when done
+cursor.close()
+conn.close()
+```
+
+## 15. JSON Data Connection
+
+### 15.1 Loading JSON Data
+
+```python
+# Load JSON data from a file
+with open('data.json', 'r') as json_file:
+    data = json.load(json_file)
+    print(data)
+```
+
+### 15.2 Writing JSON Data
+
+```python
+# Write Python data to a JSON file
+data_to_write = {'name': 'John', 'age': 30, 'city': 'New York'}
+
+with open('output.json', 'w') as json_file:
+    json.dump(data_to_write, json_file)
+```
+
+```
+
+