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提交日期 题目名称 提交代码
2025-12-16 销售金额前10的商品信息 
select goods_id ,sum(order_gmv) as heji
from order_info
where date(order_time)="2024-09-10"
group by goods_id
order bysum(order_gmv)desc
limit 10
;
2025-12-16 表连接(2)渣男去过我对象没去过,那就用LeftJoin 
select a.mch_nm as asshpile,a.txt_cnt,b.mch_nm as darling 
from
(select mch_nm,count(1) txt_cnt
from cmb_usr_trx_rcd 
where year(trx_time) in(2023,2024) and usr_id='5201314520'
group by mch_nm
having count(1)>=20)a
leftjoin 
(select distinct mch_nm
from cmb_usr_trx_rcd
where year(trx_time) in(2023,2024) and usr_id='5211314521')b
on a.mch_nm=b.mch_nm 
order by 2 desc
;
2025-12-16 表连接(1)你们难道都去过?那就试试用InnerJoin 
select a.* from 
(select distinct mch_nm
from cmb_usr_trx_rcd
where usr_id='5201314520' and year(trx_time)='2024')a
inner join
(select distinct mch_nm
from cmb_usr_trx_rcd
where usr_id='5211314521' and year(trx_time)='2024')b
on a.mch_nm = b.mch_nm
order by 1 DESC
;
2025-12-16 子查询(1)玩的最嗨那天在做甚?要用Where子查询 
select * 
from cmb_usr_trx_rcd 
where usr_id = "5201314520" and year(trx_time) = '2024'
order bytrx_amt desc
limit 1
;
2025-12-12 字符串与通配符(2)好多关键词做规则,可以使用rlike 
select
       case 
        when mch_nm regexp '按摩保健休闲' then '按摩保健休闲'
        when mch_nm regexp '按摩|保健|休闲|spa|养生|会所' then '按摩、保健、休闲、养生、SPA、会所'
    end as reg_rules,
      count(distinct mch_nm) as mch_cnt
from
    cmb_usr_trx_rcd
where mch_nm regexp '按摩保健休闲'
   or mch_nm regexp '按摩|保健|休闲|spa|养生|会所'
group by reg_rules
order by mch_cnt desc;
2025-12-12 字符串与通配符(1)名称里面有特服,可以使用通配符 
select count(distinct mch_nm)as mch_cnt
from 
cmb_usr_trx_rcd 
where mch_nm regexp '按摩保健休闲';
2025-12-12 分类(1)姿势太多很过分,分类要用CaseWhen 
select 
case when trx_amt=288 then '1.WithHand'
when trx_amt=388 then '2.WithMimi'
when trx_amt=588 then '3.BlowJobbie'
when trx_amt=888 then '4.Doi'
when trx_amt=1288 then '5.DoubleFly'
else '6.other'
end as 
ser_typ,count(1)as trx_cnt,min(date(trx_time))as first_date
 from cmb_usr_trx_rcd 
 where usr_id='5201314520' and mch_nm='红玫瑰按摩保健休闲'
group by ser_typ
order by 1;
2025-12-11 分组与聚合函数(6)想知道渣男有多坏,疯狂使用GroupBy 
select usr_id,mch_nm,sum(trx_amt)as trx_amt,count(trx_amt)as trx_cnt,min(trx_time) as first_time
from cmb_usr_trx_rcd 
where usr_id='5201314520' and trx_amt>=288
group by usr_id,mch_nm
order by count(trx_amt) desc
;
2025-12-11 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select usr_id,trx_time as first_time,mch_nm
from cmb_usr_trx_rcd 
where mch_nm='红玫瑰按摩保健休闲' and usr_id='5201314520'
order by trx_time 
limit 1;
2025-12-11 分组与聚合函数(5)五花八门的项目,其实都有固定套路(2) 
select
trx_amt,
count(1) as total_trx_cnt,
count(distinct usr_id) as unique_usr_cnt,
count(1)/count(distinct usr_id) as avg_trx_per_user
from cmb_usr_trx_rcd 
where mch_nm='红玫瑰按摩保健休闲'
and left(trx_time,7) between '2023-01' and '2024-06'
group by trx_amt
order by avg_trx_per_user desc
limit 5
;
2025-12-10 分组与聚合函数(3)五花八门的项目,其实都有固定套路(1) 
select trx_amt,count(1)as sun
from cmb_usr_trx_rcd 
where mch_nm='红玫瑰按摩保健休闲'
and left(trx_time,7) between '2024-01' and '2024-07'
group by trx_amt
order by sun desc
limit 5;
2025-12-10 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),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 '2024-09-01' and '2024-09-30'
group by date(trx_time)
order by date(trx_time)
;
2025-12-09 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 year(trx_time)='2024' andusr_id='5201314520'
group by mch_nm
order by sum_trx_amt desc;
2025-12-04 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 '2024-9-01' and '2024-9-30'
and hour(trx_time) in (22, 23, 0, 1, 2, 3, 4, 5) 
and usr_id='5201314520'
order by trx_time
;
2025-12-04 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 "2024-9-01" and "2024-9-30"
 and
(hour(trx_time) >=22)
 or (hour(trx_time) between 0 and 5)
 and usr_id="5201314520"
order by trx_time
;
2025-12-03 条件过滤(3)Hour函数很给力,组合条件要仔细 
select * from cmb_usr_trx_rcd 
wheretrx_time between '2024-9-01 22:00:00'and '2024-9-30 05:00:00' and 
usr_id='5201314520'
order by trx_time
;
2025-12-03 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 trx_time between '2024-09-01' and '2024-09-30 ' and usr_id='5201314520'
and hour(trx_time) between '01:00' and '05:00'
order by trx_time
;
2025-12-03 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 trx_time between '2024-09-01 01:00:00' and '2024-09-30 05:00:00' 
order by trx_time
;
2025-12-03 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 '2024-9-1' and'2024-9-30' and 
usr_id='5201314520'
order by trx_time
;