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
# 现需要查询 Tom 这个客户在 2023 年每月的消费金额（按月份正序显示） select date_format(t_time,'%Y-%m') as 'time', round(sum(t_amount),1) as total from trade t join customer c on t.t_cus=c.c_id where year(t_time) = '2023' and t.t_type=1 and c.c_name ='Tom' group by date_format(t_time,'%Y-%m') order by date_format(t_time,'%Y-%m') ;
正好最近一直想了解开源项目这方面的东西