Android SQLITE-从账单表中获得前5名付费客户

我有带有rowid、customer mobile和amount字段的Bill表。账单表可以有任意数量的特定手机号码条目。我想按支付金额提取前5名客户订单

Table Bill ----------------------------------- id mobile amount ----------------------------------- 1 8800 100 2 2244 200 3 8800 50 4 2134 100 5 2244 500 6 6789 100 7 2134 50 8 2244 100 9 8800 200 账单 ----------------------------------- 身份证流动金额 ----------------------------------- 1 8800 100 2 2244 200 3 8800 50 4 2134 100 5 2244 500 6 6789 100 7 2134 50 8 2244 100 9 8800 200 注意-首先我想计算特定客户支付的所有金额的总和，然后按降序排序，然后从数据中找出前5名。

尝试：

select mobile, sum(amount) as total_amount 
from Bill 
group by mobile 
order by total_amount 
desc limit 5

尝试：

select mobile, sum(amount) as total_amount 
from Bill 
group by mobile 
order by total_amount 
desc limit 5