Delete all rows from a table
    :param dbconn: data base connection
    :param table_name: name of the table
    :return:

def clear_table(dbconn, table_name):
    """
    Delete all rows from a table
    :param dbconn: data base connection
    :param table_name: name of the table
    :return:
    """
    cur = dbconn.cursor()
    cur.execute("DELETE FROM '{name}'".format(name=table_name))
    dbconn.commit()