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
2025-01-30 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%'|'%养生%'|'%SPA%'|'%会所%') then '按摩、保健、休闲、养生、SPA、会所'
	 when mch_nm LIKE '%按摩保健休闲%' then '按摩保健休闲'
 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%'|'%养生%'|'%SPA%'|'%会所%') or mch_nm LIKE '%按摩保健休闲%'
group by reg_rules
order by mch_cnt desc
2025-01-30 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) mch_cnt from cmb_usr_trx_rcd
where mch_nm LIKE '%按摩保健休闲%'
2025-01-30 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
2025-01-30 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) trx_amt,
count(mch_nm) trx_cnt,
min(trx_time) first_time
from cmb_usr_trx_rcd 
where usr_id='5201314520' and trx_amt>=288
group by mch_nm
order by trx_cnt desc
2025-01-30 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)first_time,
mch_nm from cmb_usr_trx_rcd 
where usr_id='5201314520' and mch_nm='红玫瑰按摩保健休闲'
2025-01-27 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(trx_amt) as total_trx_cnt,count(distinct usr_id) as unique_usr_cnt,count(trx_amt)/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
2025-01-27 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(trx_amt) as total_trx_cnt,count(usr_id) as unique_usr_cnt,count(trx_amt)/count(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
2025-01-27 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(trx_amt) as trx_cnt from cmb_usr_trx_rcd 
where mch_nm='红玫瑰按摩保健休闲'and date(trx_time) between '2024-01-01'and '2024-07-31'
group by trx_amt
order by trx_cnt desc
limit 5
2025-01-25 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,min(trx_amt),max(trx_amt),avg(trx_amt),sum(trx_amt) from cmb_usr_trx_rcd
where DATE_FORMAT(trx_time, '%Y-%m') = '2024-09'
AND mch_nm = '红玫瑰按摩保健休闲'
group by date(trx_time)
order by trx_date
2025-01-25 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_amtfrom cmb_usr_trx_rcd
where usr_id='5201314520' and year(trx_time)=2024
group by mch_nm
order by sum_trx_amt desc
2024-12-13 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 ((hour(trx_time)>= 22)
        or
        (hour(trx_time) between 0 and 5))
    and usr_id = '5201314520' 
		order by trx_time
2024-12-13 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 (
        (hour(trx_time) >= 22) 
        AND
        (hour(trx_time) between 0 and 5) 
    )
    and usr_id = '5201314520' 
order by trx_time
2024-12-13 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 hour(trx_time) between 1 and 5 
    and usr_id = '5201314520' 
order by trx_time
2024-12-13 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
2024-12-13 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'