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提交日期 题目名称 提交代码
2024-12-26 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(trx_amt) trx_cnt,
min(trx_time) 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
2024-12-26 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 mch_nm = '红玫瑰按摩保健休闲'
and usr_id = '5201314520'
group by 1
2024-12-26 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) total_trx_cnt,
count(distinct usr_id) unique_usr_cnt,
count(trx_amt)/count(distinct usr_id) avg_trx_per_user
from cmb_usr_trx_rcd
where date(trx_time) between '2023-01-01' and '2024-06-30'
and mch_nm = '红玫瑰按摩保健休闲'
group by 1
order by avg_trx_per_user desc
limit 5
2024-12-26 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 year(trx_time) = '2024'
and month(trx_time) between '1' and '7'
and mch_nm = '红玫瑰按摩保健休闲'
group by trx_amt
order by trx_cnt desc
limit 5
2024-12-26 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 year(trx_time) = '2024'
and month(trx_time) = '9'
and mch_nm = '红玫瑰按摩保健休闲'
group by date(trx_time)
order by trx_date
2024-12-26 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;
2024-12-26 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 usr_id = '5201314520'
and year(trx_time) = '2024'
and month(trx_time) = '9'
and mch_nm = '红玫瑰按摩保健休闲'
group by 1
order by trx_date
2024-12-26 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 usr_id = '5201314520'
and year(trx_time) = '2024'
and month(trx_time) = '9'
group by 1
order by trx_date
2024-12-26 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) sum_trx_amt
from cmb_usr_trx_rcd
where year(trx_time) = '2024'
and usr_id = '5201314520'
group by 1
order by sum_trx_amt desc
2024-12-26 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
2024-12-26 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 usr_id = '5201314520'
and hour(trx_time) between '1' and '5'
order by trx_time
2024-12-26 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
2024-12-26 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'
2024-12-26 抖音面试真题(1)T+1日留存率 
with data1 as
 (
 select
 distinct usr_id,
 date(login_time) login_date
 from user_login_log
 where datediff(current_date, date(login_time)) <=30
 ),
 data2 as
 (
 select
 t1.usr_id
 ,t1.login_date as dt
 ,t2.login_date as dt1
 from data1 t1
 left join data1 t2
 on t1.usr_id = t2.usr_id
and datediff(t2.login_date, t1.login_date) = 1 
 )
 select
 	dt as login_date,
 	concat(round(avg(dt1 is not null)*100, 2), '%') as T1_retention_rate
 from data2
 group by dt
 order by dt