获取按周分组的数据

Question

我想计算按周分组的行数，如下所示

    SELECT count(*) AS count, week(creating_date,1) AS week
    FROM USERS 
    GROUP BY week(creating_date,1)

但它计算了添加用户的周数。我想获得每周的报告，如果没有添加用户，则应返回0.