题解 | 获取指定客户每月的消费额
获取指定客户每月的消费额
https://www.nowcoder.com/practice/ed04f148b63e469e8f62e051d06a46f5
select
date_format(t.t_time,'%Y-%m') as time,
sum(t.t_amount) as total
from trade t join customer c on t.t_cus=c.c_id
where c.c_name='Tom'and year(t.t_time)=2023 and t.t_type=1
group by date_format(t.t_time,'%Y-%m')
order by time
