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提交日期 题目名称 提交代码
2026-03-31 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),
 min(trx_amt),
 avg(trx_amt),
 sum(trx_amt)
from cmb_usr_trx_rcd 
where mch_nm='红玫瑰按摩保健休闲'
and date(trx_time) between '20240901' and '20240930'
group by date(trx_time)
order by date(trx_time);
2026-03-31 分组与聚合函数（1）Money全都花在哪，GroupBy来查一查  
select mch_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;
2026-03-31 分组与聚合函数（1）Money全都花在哪，GroupBy来查一查  
select mch_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;
2026-03-31 分组与聚合函数（1）Money全都花在哪，GroupBy来查一查  
select mch_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;
2026-03-31 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 date(trx_time) between '2024-09-01' and '2024-09-30'
and usr_id='5201314520'
and (hour(trx_time) >=22 or hour(trx_time) <=5)
order by trx_time;
2026-03-31 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 date(trx_time) between '2024-09-01' and '2024-09-30'
and usr_id='5201314520'
and (hour(trx_time) >=22 or hour(trx_time) <=5);
2026-03-31 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 date(trx_time) between '2024-09-01' and '2024-09-30'
and usr_id='5201314520'
and hour(trx_time) between 1 and 5
order by trx_time;
2026-03-31 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
2026-03-31 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 
    trx_time between '2024-09-01' and '2024-09-30'
    and usr_id='5201314520'
order by 
    trx_time
2026-03-31 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
2026-03-31 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 trx_time between '20240901' and '20240930' and usr_id='5201314520'
order by trx_time;
2026-03-31 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 trx_time between '20240901' and '20240930' and usr_id='5201314520'
order by trx_time
limit 8;
2026-03-31 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 trx_time between '20240901' and '20240930'
order by trx_time;
2026-03-31 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 trx_time between '20240901' and '20240930';