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2026-01-30 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 lower(mch_nm) rlike '.*(按摩|保健|休闲|spa|养生|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 mch_nm like '%按摩保健休闲%'
 or lower(mch_nm) rlike '.*(按摩|保健|休闲|spa|养生|会所).*'
 group by reg_rules
 order by mch_cnt desc
2026-01-30 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%'
2026-01-30 分类（1）姿势太多很过分，分类要用CaseWhen  
select
case when trx_amt =288then '1.WithHand'
 when trx_amt =388then '2.WithMimi'
 when trx_amt =588then '3.BlowJobbie'
 when trx_amt =888then '4.Doi'
 when trx_amt =1288then '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 ser_typ Asc
2026-01-30 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 count(mch_nm) desc
2026-01-30 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
group by usr_id,mch_nm
having sum(trx_amt) >= 288
 order by count(mch_nm) desc
2026-01-30 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
andmch_nm ='红玫瑰按摩保健休闲'
group by usr_id, mch_nm
2026-01-30 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