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
2025-01-22 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 "1:00:00" and "6:00:00"
order by 
	trx_time
2025-01-22 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 "1:00:00" and "6:00:00"
order by 
	usr_id
2025-01-22 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
2025-01-09 销售金额前10的商品信息 
SELECT 
    goods_id, 
    SUM(order_gmv) AS total_gmv
FROM 
    order_info
WHERE 
    DATE(order_time) = '2024-09-10'
GROUP BY 
    goods_id
ORDER BY 
    total_gmv DESC
LIMIT 10;
2025-01-09 表连接(2)渣男去过我对象没去过,那就用LeftJoin 
select a.mch_nm as asshole_tried,a.trx_cnt, b.mch_nm as darling_tried from 
(select mch_nm, count(1) trx_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
left join
(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
2025-01-09 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
    trx_amt = (
        select max(trx_amt)
        from cmb_usr_trx_rcd
        where usr_id = '5201314520'
          and year(trx_time) = 2024
    )
    and usr_id = '5201314520'
    and year(trx_time) = 2024;
2025-01-08 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 upper(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 upper(mch_nm) rlike '.*(按摩|保健|休闲|SPA|养生|会所).*'
group by reg_rules
order by mch_cnt desc;
2025-01-08 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%'
2025-01-08 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
2025-01-08 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(*) 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
2025-01-08 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select 
	usr_id,
mch_nm,
min(trx_time) as first_time
from 
	cmb_usr_trx_rcd
where
	mch_nm="红玫瑰按摩保健休闲"
and usr_id="5201314520"
group by usr_id,mch_nm
2025-01-08 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select 
	usr_id,
mch_nm,
min(trx_time) as first_time
from cmb_usr_trx_rcd
where
	mch_nm="红玫瑰按摩保健休闲"
and usr_id="5201314520"
group by usr_id,mch_nm
2025-01-08 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select 
	usr_id,
mch_nm,
min(trx_time) as first_time
from cmb_usr_trx_rcd
where
	mch_nm="红玫瑰按摩保健休闲"
and usr_id="5201314520"
group by usr_id,mch_nm;
2025-01-08 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select 
	usr_id,
mch_nm,
min(trx_time) as first_time
from cmb_usr_trx_rcd
where
	mch_nm="红玫瑰按摩保健休闲"
and usr_id="5201314520"
group by usr_id
order by first_time
2025-01-08 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'
group by
    usr_id, mch_nm;
2025-01-08 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(*) as total_trx_cnt, 
    count(distinct usr_id) as unique_usr_cnt, 
    count(*) / 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 '2023-1-1' and '2024-6-30'
group by
    trx_amt 
order by
    avg_trx_per_user desc 
limit 5;
2025-01-08 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(*) 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 '2024-1-1' and '2024-7-31'
group by trx_amt
order by trx_cnt desc
limit 5
2025-01-08 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) in (1, 2, 3, 5, 6, 7) 
group by
    trx_amt 
order by
    trx_cnt desc 
limit 5;
2025-01-07 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 date(trx_time) between '2024-09-01' and '2024-09-30' 
group by
    date(trx_time) 
order by
    trx_date;
2025-01-07 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 date(trx_time) between '2024-09-01' and '2024-09-30' 
group by
    date(trx_time) 
order by
    trx_date;