Design a Python script that utilizes the OpenWeatherMap API to get the current weather information for a specified city and stores the results in a SQLite database.

To create a Python script that utilizes the OpenWeatherMap API to get the current weather information for a specified city and stores the results in a SQLite database, follow these steps:

1. Sign up for an API key from OpenWeatherMap: https://openweathermap.org/appid
2. Install the required libraries:
   ```
   pip install requests
   ```

3. Create a new Python file (e.g., `weather_app.py`) and add the following code:

```python
import requests
import sqlite3
from datetime import datetime

# Replace this with your own API key
API_KEY = "your_openweathermap_api_key"

def get_weather_data(city):
    url = f"http://api.openweathermap.org/data/2.5/weather?q={city}&appid={API_KEY}"
    response = requests.get(url)
    
    if response.status_code == 200:
        return response.json()
    else:
        print(f"Error fetching data for {city}: {response.status_code}")
        return None

def store_weather_data(data):
    conn = sqlite3.connect("weather.db")
    cursor = conn.cursor()

    # Create table if it doesn't exist
    cursor.execute("""
        CREATE TABLE IF NOT EXISTS weather (
            id INTEGER PRIMARY KEY,
            city TEXT,
            country TEXT,
            temperature REAL,
            humidity INTEGER,
            pressure INTEGER,
            description TEXT,
            dt TIMESTAMP
        )
    """)

    # Insert data into the table
    cursor.execute("""
        INSERT INTO weather (city, country, temperature, humidity, pressure, description, dt) VALUES (?, ?, ?, ?, ?, ?, ?)
    """, (
        data["name"],
        data["sys"]["country"],
        data["main"]["temp"] - 273.15,  # Convert Kelvin to Celsius
        data["main"]["humidity"],
        data["main"]["pressure"],
        data["weather"][0]["description"],
        datetime.fromtimestamp(data["dt"])
    ))

    conn.commit()
    conn.close()

def main():
    city = input("Enter the name of a city: ")
    weather_data = get_weather_data(city)

    if weather_data:
        store_weather_data(weather_data)
        print(f"Weather data for {city} has been stored in the database.")

if __name__ == "__main__":
    main()
```

4. Replace `your_openweathermap_api_key` with your actual API key.
5. Run the script using Python:

   ```
   python weather_app.py
   ```

6. Enter the name of a city when prompted, and the script will fetch the current weather information for that city and store it in an SQLite database named `weather.db`.

Note: This script assumes you have already installed Python on your system. If not, please download and install Python from https://www.python.org/downloads/.