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提交日期 题目名称 提交代码
2024-11-25 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%' and usr_id =5201314520
2024-11-25 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
2024-11-24 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
2024-11-24 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(1) 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
2024-11-24 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(1) trx_cnt, min(trx_time) first_time from cmb_usr_trx_rcd 
where usr_id=5201314520 
group by mch_nm
order by trx_cnt desc
2024-11-24 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), count(1) trx_cnt, min(trx_time) first_time from cmb_usr_trx_rcd 
where usr_id=5201314520 
group by mch_nm
order by trx_cnt desc
2024-11-24 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;
2024-11-24 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select
    usr_id,
    max(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;
2024-11-24 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 '2023-1-1' and '2024-6-30'
and mch_nm = '红玫瑰按摩保健休闲'
group by trx_amt
order by avg_trx_per_user desc
limit 5
2024-11-24 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_use
from cmb_usr_trx_rcd 
where date(trx_time) between '2023-1-1' and '2024-6-30'
and mch_nm = '红玫瑰按摩保健休闲'
group by trx_amt
order by avg_trx_per_use desc
limit 5
2024-11-24 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_use
from cmb_usr_trx_rcd 
where date(trx_time) between '2023-1-1' and '2024-6-30'
and mch_nm = '红玫瑰按摩保健休闲'
group by trx_amt
order by total_trx_cnt desc
limit 5
2024-11-24 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)
from cmb_usr_trx_rcd 
where date(trx_time) between '2023-1-1' and '2024-6-30'
and mch_nm = '红玫瑰按摩保健休闲'
group by trx_amt
order by total_trx_cnt desc
limit 5
2024-11-24 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)
from cmb_usr_trx_rcd 
where date(trx_time) between '2023-1-1' and '2024-6-30'
and mch_nm = '红玫瑰按摩保健休闲'
group by trx_amt
order by total_trx_cnt desc
2024-11-24 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(date(trx_time) between '2024-01-01' and '2024-7-31')
and mch_nm = '红玫瑰按摩保健休闲'
group by
trx_amt
order by trx_cnt desc
limit 5
2024-11-24 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 usr_id = 5201314520 and (date(trx_time) between '2024-01-01' and '2024-7-31')
and mch_nm = '红玫瑰按摩保健休闲'
group by
trx_amt
order by trx_cnt desc
limit 5
2024-11-24 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;
2024-11-24 分组与聚合函数(2)擦边营收怎么样,聚合函数可看出 
select 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 usr_id = 5201314520 and year(trx_time) = '2024'
and month(trx_time) = '9'
group by trx_time
order by trx_time
2024-11-24 分组与聚合函数(2)擦边营收怎么样,聚合函数可看出 
select 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 usr_id = 5201314520 and year(trx_time) = '2024'
and month(trx_time) = '9'
2024-11-23 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 usr_id =5201314520 and 
year(trx_time)= 2024
group by mch_nm
order by sum(trx_amt) desc
2024-11-23 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) from cmb_usr_trx_rcd 
where usr_id =5201314520 and 
year(trx_time)= 2024
group by mch_nm
order by sum(trx_amt) desc