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提交日期 题目名称 提交代码
2025-01-12 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%'
2025-01-12 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%'
2025-01-12 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
2025-01-12 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 1
2025-01-12 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
usr_id
,mch_nm
order by trx_cnt desc
2025-01-12 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
    ,max(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 4 desc
2025-01-12 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 usr_id, mch_nm
order by 4 desc
2025-01-12 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
,count(1) as trx_cnt
,sum(trx_amt) as trx_amt
,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
2025-01-12 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select 
usr_id
,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
order by trx_time asc
limit 1;
2025-01-12 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select 
usr_id
,mch_nm
,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
order by trx_time asc
limit 1;
2025-01-12 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) as total_trx_cnt
,count(distinct usr_id) as unique_usr_cnt
,count(trx_amt)/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 "2023-01-01" and "2024-06-30"
group by trx_amt
order by avg_trx_per_user desc
limit 5
2025-01-12 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) as total_trx_cnt
,count(distinct trx_amt) as unique_usr_cnt
,avg(trx_amt) 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 "2023-01-01" and "2024-06-30"
group by trx_amt
order by trx_amt desc
limit 5
2025-01-12 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) as total_trx_cnt
,count(distinct trx_amt) as unique_usr_cnt
,avg(trx_amt) 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 "2023-01-01" and "2024-06-30"
group by trx_amt
order by trx_amt desc
2025-01-12 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) as total_trx_cnt
,count(distinct trx_amt) as unique_usr_cnt
,avg(trx_amt) as avg_trx_per_user
from cmb_usr_trx_rcd
group by trx_amt
order by trx_amt desc
2025-01-12 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 date(trx_time) between '2024-01-01' and '2024-07-31'
group by trx_amt
order by trx_cnt desc
limit 5
2025-01-12 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 date(trx_time) between '2024-01-01' and '2024-07-31'
group by trx_amt
order by trx_cnt
limit 5
2025-01-12 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 year(trx_time)=2024 
and month(trx_time)=09
group by date(trx_time)
order by trx_date
2025-01-12 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;
2025-01-12 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 '2023-09-30' 
group by
    date(trx_time) 
order by
    trx_date;
2025-01-12 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' 
    or date(trx_time) between '2024-09-01' and '2023-09-30' 
group by
    date(trx_time) 
order by
    trx_date;