def create_tweets_table(term_to_search):
    """
    This function open a connection with an already created database and creates a new table to
    store tweets related to a subject specified by the user
    """

    #Connect to Twitter Database created in Postgres
    conn_twitter = psycopg2.connect(dbname=dbnametwitter, user=usertwitter, password=passwordtwitter, host=hosttwitter, port=porttwitter)

    #Create a cursor to perform database operations
    cursor_twitter = conn_twitter.cursor()

    #with the cursor now, create two tables, users twitter and the corresponding table according to the selected topic
    cursor_twitter.execute("CREATE TABLE IF NOT EXISTS twitter_users (user_id VARCHAR PRIMARY KEY, user_name VARCHAR);")

    query_create = "CREATE TABLE IF NOT EXISTS %s (id SERIAL, created_at timestamp, tweet text NOT NULL, user_id VARCHAR, retweetcount int, PRIMARY KEY(id), FOREIGN KEY(user_id) REFERENCES twitter_users(user_id));" %("tweets_"+term_to_search)
    cursor_twitter.execute(query_create)

    #Commit changes
    conn_twitter.commit()

    #Close cursor and the connection
    cursor_twitter.close()
    conn_twitter.close()
    return