input: Write a python function to execute a SELECT query on an SQLite database and return the results as a list of tuples.
  assert select_query('mydatabase.db', 'mytable') == [(1, 'Alice'), (2, 'Bob'), (3, 'Charlie')]
  assert select_query('mydatabase.db', 'emptytable') == []
  assert select_query('testdb.db', 'users') == [(101, 'David'), (102, 'Eva')]
output: import sqlite3
  
  def select_query(database, table):
      conn = sqlite3.connect(database)
      cursor = conn.cursor()
      cursor.execute(f'SELECT * FROM {table}')
      results = cursor.fetchall()
      conn.close()
      return results