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
2024-12-09 表连接(1)你们难道都去过?那就试试用InnerJoin 
select distinct t1.mch_nm
from
(select * 
from cmb_usr_trx_rcd 
where usr_id = '5201314520'
and year(trx_time) = 2024) t1 
inner join 
(select * 
from cmb_usr_trx_rcd 
where usr_id = '5211314521'
and year(trx_time) = 2024) t2
using(mch_nm)
order by t1.mch_nm desc
2024-12-09 表连接(1)你们难道都去过?那就试试用InnerJoin 
select distinct t1.mch_nm
from
(select * 
from cmb_usr_trx_rcd 
where usr_id = '5201314520') t1 
inner join 
(select * 
from cmb_usr_trx_rcd 
where usr_id = '5211314521') t2
using(mch_nm)
order by t1.mch_nm desc
2024-12-09 表连接(1)你们难道都去过?那就试试用InnerJoin 
select distinct t1.mch_nm
from
(select * 
from cmb_usr_trx_rcd 
where usr_id = '5201314520') t1 
inner join 
(select * 
from cmb_usr_trx_rcd 
where usr_id = '5211314521') t2
using(mch_nm)
order by t1.mch_nm
2024-12-09 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 usr_id = '5201314520'
and year(trx_time) = 2024
order by trx_amt desc 
limit 1
2024-12-09 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) 
from cmb_usr_trx_rcd 
where mch_nm like '%按摩保健休闲%'
and usr_id = '5201314520'
2024-12-09 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_type
,count(1) as trx_cnt
,min(date(trx_time)) as first_date
from cmb_usr_trx_rcd 
where mch_nm = '红玫瑰按摩保健休闲'
and usr_id = '5201314520'
group by ser_type
order by ser_type
2024-12-09 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(mch_nm) 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
2024-12-09 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
,min(trx_time) as first_time
,count(mch_nm) as trx_cnt
,sum(trx_amt) as ttl
from cmb_usr_trx_rcd 
where usr_id = '5201314520'
and trx_amt >= 288
group by usr_id,mch_nm
order by trx_cnt desc
2024-12-09 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
,min(trx_time) as first_time
,count(mch_nm) as trx_cn
,sum(trx_amt) as ttl
from cmb_usr_trx_rcd 
where usr_id = '5201314520'
and trx_amt >= 288
group by usr_id,mch_nm
2024-12-09 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) ,mch_nm
from cmb_usr_trx_rcd 
where usr_id = '5201314520'
and mch_nm = '红玫瑰按摩保健休闲'
order by trx_time
limit 1
2024-12-09 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select * 
from cmb_usr_trx_rcd 
where usr_id = '5201314520'
and mch_nm = '红玫瑰按摩保健休闲'
order by trx_time
limit 1
2024-12-09 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),count(distinct usr_id) as unique_usr_cnt,
count(1)/count(distinct usr_id) as avg_trx_per_usr
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_usr desc
limit 5
2024-12-09 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),count(distinct usr_id) as unique_usr_cnt,
count(1)/count(distinct usr_id) as avg_trx_per_usr
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
2024-12-09 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 usr_id ,count(usr_id)
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 usr_id
2024-12-09 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_cn
from cmb_usr_trx_rcd 
where date(trx_time) between '2024-01-01' and '2024-07-31'
and mch_nm = '红玫瑰按摩保健休闲'
group by trx_amt
order by trx_cn desc
limit 5
2024-12-09 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)
2024-12-09 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 month(trx_time) = 9 and year(trx_time) = 2024
group by date(trx_time)
2024-12-09 分组与聚合函数(2)擦边营收怎么样,聚合函数可看出 
select day(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 month(trx_time) = 9 and year(trx_time) = 2024
group by day(trx_time)
2024-12-09 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
and usr_id = '5201314520'
group by mch_nm 
order by sum_trx_amt desc
2024-12-09 条件过滤(3)Hour函数很给力,组合条件要仔细 
select count(*) 
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 0 and 5
order by trx_time