排名

用户解题统计

过去一年提交了

勋章 ①金银铜：在竞赛中获得第一二三名；②好习惯：自然月10天提交；③里程碑：解决1/2/5/10/20/50/100/200题；④每周打卡挑战：完成每周5题，每年1月1日清零。

收藏

收藏日期 题目名称 解决状态
没有收藏的题目。

评论笔记

评论日期 题目名称 评论内容 站长评论
没有评论过的题目。

提交记录

提交日期 题目名称 提交代码
2025-02-12 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 like '%按摩保健休闲%' then '按摩保健休闲'
when mch_nm rlike '.*(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 like '%按摩保健休闲%'
or lower(mch_nm) rlike '.*(按摩|保健|休闲|spa|养生|会所).*' 
group by reg_rules
order by mch_cnt desc
2025-02-12 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 like '%按摩保健休闲%'
2025-02-12 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 ser_typ
2025-02-12 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(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 ser_typ
2025-02-12 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(1) as trx_cnt,
min(trx_time) as first_time
from cmb_usr_trx_rcd
where usr_id='5201314520'
and trx_amt>=288
group by mch_nm
order by trx_cnt desc
2025-02-12 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(1) 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 trx_cnt desc
2025-02-12 分组与聚合函数（5）想知道何时成瘾，用Max Or Min？  
select 
usr_id,
min(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'
2025-02-12 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_user_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 date(trx_time) between '2023-01-01' and '2024-06-30'
group by trx_amt
order by avg_trx_per_user desc
limit 5
2025-02-12 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 trx_cnt
from cmb_usr_trx_rcd
where mch_nm='红玫瑰按摩保健休闲'
and year(trx_time)=2024
and month(trx_time) between '1' and '7'
group by trx_amt
order by trx_cnt desc
limit 5;
2025-02-12 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 mch_nm='红玫瑰按摩保健休闲'
and year(trx_time)=2024
and month(trx_time)=09
group by trx_date
order by trx_date asc
2025-02-12 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
2025-02-12 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)>=22 or hour(trx_time) between 0 and 5)
order by trx_time asc
2025-02-12 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)>=22) or (hour(trx_time) between 0 and 5)
order by trx_time asc
2025-02-12 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)>22) or (hour(trx_time) between 0 and 5)
order by trx_time asc
2025-02-12 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 asc
2025-02-12 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 '01:00:00' and '06:00:00'
order by trx_time asc
2025-02-12 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
2025-02-12 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
2025-02-12 文科潜力股  
select
*
from scores
where exam_date='2024-06-30'
and subject in ('历史','政治','地理')
and score>=90
order by score desc,student_id,subject
2025-02-12 给英语成绩中上水平的学生拔尖  
select
*
from scores
where subject='英语'
and exam_date='2024-06-30' 
and score between 100 and 110
order by score desc