input: Write a python function to scrape URLs from a webpage and insert them into a SQLite database.
  assert set(get_urls('http://example.com')) == set(['http://example.com/page1', 'http://example.com/page2', 'http://example.com/page3'])
  assert set(get_urls('http://test.com')) == set(['http://test.com/home', 'http://test.com/about', 'http://test.com/contact'])
  assert set(get_urls('http://mysite.com')) == set(['http://mysite.com/index', 'http://mysite.com/blog', 'http://mysite.com/help'])
output: import requests
  from bs4 import BeautifulSoup
  import sqlite3
  
  def get_urls(url):
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      urls = [a['href'] for a in soup.find_all('a', href=True)]
      
      conn = sqlite3.connect('urls.db')
      c = conn.cursor()
      c.execute('''CREATE TABLE IF NOT EXISTS urls
                   (url TEXT)''')
      c.executemany('INSERT INTO urls (url) VALUES (?)', [(url,) for url in urls])
      conn.commit()
      conn.close()
      
      return urls