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提交日期 题目名称 提交代码
2026-01-06 分组与聚合函数（2）擦边营收怎么样，聚合函数可看出  
select date(trx_time) as trx_date,max(trx_amt) as max_trx_amt,min(trx_amt) as min_trx_amt,avg(trx_amt) as avg_trx_amt,sum(trx_amt) as total_trx_amt
from cmb_usr_trx_rcd 
where year(trx_time)= 2024 and month(trx_time)=9
and mch_nm = '红玫瑰按摩保健休闲'
group by date(trx_time)
order by trx_date
2026-01-06 分组与聚合函数（2）擦边营收怎么样，聚合函数可看出  
select date(trx_time) as trx_date,max(trx_time) as max_trx_amt,min(trx_time) as min_trx_amt,avg(trx_time) as avg_trx_amt,sum(trx_amt) as total_trx_amt
from cmb_usr_trx_rcd 
where date(trx_time) between '2024-09-01' and '2024-09-30'
and mch_nm = '红玫瑰按摩保健休闲'
group by date(trx_time)
order by trx_date
2026-01-06 分组与聚合函数（2）擦边营收怎么样，聚合函数可看出  
select date(trx_time) as trx_date,max(trx_time) as max_trx_amt,min(trx_time) as min_trx_amt,avg(trx_time) as avg_trx_amt,sum(trx_amt) as total_trx_amt
from cmb_usr_trx_rcd 
where year(trx_time) = 2024 and month(trx_time) = 9 
and mch_nm = '红玫瑰按摩保健休闲'
group by date(trx_time)
order by trx_date
2026-01-06 分组与聚合函数（1）Money全都花在哪，GroupBy来查一查  
selectmch_nm,sum(trx_amt) as sum_trx_amt
from cmb_usr_trx_rcd 
where usr_id ='5201314520' and year(trx_time) = '2024'
group by mch_nm
order by sum_trx_amt desc;
2026-01-06 条件过滤（3）Hour函数很给力，组合条件要仔细  
select * from cmb_usr_trx_rcd 
where usr_id = '5201314520'
and date(trx_time) between '2024-09-01' and '2024-09-30'
and (
(hour(trx_time) between0 and 5)
 or 
(hour(trx_time) >=22 )
)
 order by trx_time;
2026-01-06 条件过滤（2）半夜活动有猫腻，Hour函数给给力  
select * from cmb_usr_trx_rcd 
where usr_id = '5201314520' and 
date(trx_time)between '2024-09-01' and '2024-09-30' 
and hour(trx_time) between 1 and 5 
order by trx_time;
2026-01-06 条件过滤（1）异地男友有异常，数分闺蜜来帮忙  
select
    *
from
    cmb_usr_trx_rcd
where 
    date(trx_time) between '2024-09-01' and '2024-09-30'
    and usr_id='5201314520'
order by 
    trx_time
2025-12-25 条件过滤（1）异地男友有异常，数分闺蜜来帮忙  
select * 
from cmb_usr_trx_rcd 
where usr_id = '5201314520' 
and date(trx_time) between '2024-09-01' and '2024-09-30'
order by trx_time asc;
2025-12-25 条件过滤（1）异地男友有异常，数分闺蜜来帮忙  
select * 
from cmb_usr_trx_rcd 
where usr_id = '5201314520' 
and trx_time between '2024-09-01' and '2024-09-30'
order by trx_time asc;
2025-12-25 条件过滤（1）异地男友有异常，数分闺蜜来帮忙  
select * from cmb_usr_trx_rcd 
where usr_id = '5201314520' and trx_time between '2024-09-01' and '2024-09-30';