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2024-12-23 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|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 upper(mch_nm) rlike '.*(按摩|保健|休闲|SPA|养生|会所).*'
group by reg_rules
order by mch_cnt desc;
2024-12-18 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%'
2024-12-18 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%'
2024-12-18 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'
2024-12-13 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(trx_time)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
2024-12-13 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
2024-12-13 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(*) 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
2024-12-13 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(trx_time) 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
2024-12-13 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
2024-12-13 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
2024-12-13 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
limit 5
2024-12-13 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(*)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
limit 5
2024-12-13 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(trx_time)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
limit 5
2024-12-13 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(trx_time)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
limit 5
2024-12-13 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(trx_time)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
limit 5
2024-12-13 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(trx_time)as trx_cnt,
	min(trx_time)as first_time
from
	cmb_usr_trx_rcd
where
	usr_id='5201314520'
	and trx_amt>=288
group by
	mch_nm
order by
	trx_cnt desc
limit 5
2024-12-13 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(trx_time)as trx_cnt,
	min(trx_time)as first_time
from
	cmb_usr_trx_rcd
where
	usr_id='5201314520'
group by
	mch_nm
order by
	trx_cnt desc
limit 5
2024-12-13 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'
2024-12-13 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
    mch_nm = '红玫瑰按摩保健休闲' 
    and ((year(trx_time) = 2023 and month(trx_time) between 1 and 12) 
    or (year(trx_time) = 2024 and month(trx_time) between 1 and 6) )
group by
    trx_amt 
order by
    avg_trx_per_user desc 
limit 5;
2024-12-13 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
    mch_nm = '红玫瑰按摩保健休闲' 
    and (year(trx_time) = 2023 and month(trx_time) between 1 and 12) 
    or (year(trx_time) = 2024 and month(trx_time) between 1 and 6) 
group by
    trx_amt 
order by
    avg_trx_per_user desc 
limit 5;