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2025-01-07 字符串与通配符(2)好多关键词做规则,可以使用rlike 
select
case when mch_nm like ('%按摩保健休闲%') then '按摩保健休闲' when upper(mch_nm) rlike '.*(按摩|保健|休闲|养生|SPA|会所).*' then '按摩、保健、休闲、养生、SPA、会所'end as reg_rules,
count(distinct mch_nm) as mch_cnt
from cmb_usr_trx_rcd 
where upper(mch_nm) rlike '.*(按摩保健休闲|按摩|保健|休闲|养生|SPA|会所).*'
group by reg_rules
2025-01-07 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%')
2025-01-07 分类(1)姿势太多很过分,分类要用CaseWhen 
select
ser_typ,
count(1) as trx_cnt,
min(date(trx_time)) as first_date
from 
(
select 
trx_time,
trx_amt,
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
from cmb_usr_trx_rcd 
where 
usr_id='5201314520' 
and mch_nm='红玫瑰按摩保健休闲'
)t
group by ser_typ
order by ser_typ
2025-01-07 分类(1)姿势太多很过分,分类要用CaseWhen 
select
ser_typ,
count(1) as trx_cnt,
min(date(trx_time)) as first_date
from 
(
select 
trx_time,
trx_amt,
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='1388' then '5.DoubleFly' else '6.other' end as ser_typ
from cmb_usr_trx_rcd 
where 
usr_id='5201314520' 
and mch_nm='红玫瑰按摩保健休闲'
)t
group by ser_typ
order by ser_typ
2025-01-07 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
2025-01-07 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_amt desc
2025-01-07 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(
select * 
from cmb_usr_trx_rcd 
where usr_id='5201314520'
and trx_amt>=288
)t
group by 
usr_id,
mch_nm
order by trx_amt desc
2025-01-07 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'
group by usr_id,mch_nm
2025-01-07 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 (year(trx_time) = 2023 
or (year(trx_time)= 2024 and month(trx_time) between 1 and 6))
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
2025-01-07 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 year(trx_time) between 2023 and 2024
and month(trx_time) between 1 and 6
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
2025-01-07 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 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
2025-01-07 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 sum_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) =9
group by date(trx_time),mch_nm
order by date(trx_time)
2025-01-07 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 date,
mch_nm,
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 sum_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) =9
group by date(trx_time),mch_nm
order by date(trx_time)
2025-01-07 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 date,
mch_nm,
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 sum_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) =9
group by date(trx_time),mch_nm
2025-01-07 分组与聚合函数(2)擦边营收怎么样,聚合函数可看出 
select mch_nm,
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 sum_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) =9
group by mch_nm
2025-01-07 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 usr_id='5201314520'
and year(trx_time) = 2024
group by mch_nm
order by sum_trx_amt desc
2025-01-07 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 usr_id='5201314520'
group by mch_nm
order by sum_trx_amt desc
2025-01-07 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 usr_id='5201314520'
group by mch_nm
order by sum_trx_amt
2025-01-07 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 usr_id='5201314520'
and date(trx_time) between '2024-09-01' and '2024-09-30'
and (hour(trx_time) between 22 and 23
or hour(trx_time) between 0 and 5)
order by trx_time
2025-01-07 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 usr_id='5201314520'
and date(trx_time) between '2024-09-01' and '2024-09-30'
and (hour(trx_time) between 22 and 23
or hour(trx_time) between 0 and 4)
order by trx_time