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
2024-11-19 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 as trx_cnt,
b.mch_nm as darling_tried
from
(select mch_nm,count(1) as trx_cnt
from cmb_usr_trx_rcd 
where usr_id='5201314520'
and year(trx_time) in (2023,2024)
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 trx_cnt desc
2024-11-19 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
2024-11-19 表连接(1)你们难道都去过?那就试试用InnerJoin 
select distinct(mch_nm)
from cmb_usr_trx_rcd
where usr_id='5211314521'
and year(trx_time)=2024
and mch_nm in
(select mch_nm
from cmb_usr_trx_rcd
where usr_id='5201314520'
and year(trx_time)=2024)
order by mch_nm desc
2024-11-19 表连接(1)你们难道都去过?那就试试用InnerJoin 
select usr_id,mch_nm,trx_time,trx_amt 
from cmb_usr_trx_rcd
where usr_id='5211314521'
and year(trx_time)=2024
and mch_nm in
(select mch_nm
from cmb_usr_trx_rcd
where usr_id='5201314520'
and year(trx_time)=2024)
order by mch_nm desc
2024-11-19 子查询(1)玩的最嗨那天在做甚?要用Where子查询 
select usr_id,mch_nm,trx_time,trx_amt
from cmb_usr_trx_rcd
where usr_id='5201314520'
and year(trx_time) = 2024
and     trx_amt = (
        select max(trx_amt)
        from cmb_usr_trx_rcd
        where usr_id = '5201314520'
        and year(trx_time) = 2024
    )
2024-11-19 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%"
2024-11-18 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 
((year(trx_time) = 2023 and month(trx_time) between 1 and 12) 
    or (year(trx_time) = 2024 and month(trx_time) between 1 and 6))
group by
    trx_amt 
order by
    avg_trx_per_user desc 
limit 5;
2024-11-18 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;
2024-11-18 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 (year(trx_time) = 2023 and month(trx_time) between 1 and 12) 
    or (year(trx_time) = 2024 and month(trx_time) between 1 and 6) 
group by
    trx_amt 
order by
    avg_trx_per_user desc 
limit 5;
2024-11-18 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
2024-11-18 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
2024-11-18 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
2024-11-18 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
2024-11-18 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 4 desc
2024-11-18 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 usr_id='5201314520'
and mch_nm='红玫瑰按摩保健休闲'
2024-11-18 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 year(trx_time) = 2024 
    and month(trx_time) in (1, 2, 3, 4,5, 6, 7) 
group bytrx_amt
order by trx_cnt desc
limit 5
2024-11-18 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 year(trx_time) = 2024 
    and month(trx_time) in (1, 2, 3, 5, 6, 7) 
group bytrx_amt
order by trx_cnt desc
limit 5
2024-11-18 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) like '2024-09%'
group by trx_date
order by trx_date
2024-11-18 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) like '2024-03%'
group by trx_date
order by trx_date
2024-11-18 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
and usr_id='5201314520'
group by mch_nm
order by sum_trx_amt desc