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2024-10-29 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%'
2024-10-29 分类(1)姿势太多很过分,分类要用CaseWhen 
WITH categorized_trx AS (
SELECT
usr_id,
mch_nm,
trx_time,
trx_amt,
CASE
WHEN trx_amt >= 288 and trx_amt<388 THEN '1.With-hand'
WHEN trx_amt >= 388 AND trx_amt < 588 THEN '2.With-Mimi'
WHEN trx_amt >=588 AND trx_amt <888 THEN '3.Blow-Jobbie'
WHEN trx_amt >=888 AND trx_amt <1288 THEN '4.Do-i'
WHEN trx_amt =1288 THEN '5.Double-Fly'
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'
)
SELECT
ser_typ,
COUNT(*) AS trx_cnt,
MIN(trx_time) AS first_date
FROM categorized_trx
GROUP BY ser_typ
ORDER BY ser_typ;
2024-10-29 分类(1)姿势太多很过分,分类要用CaseWhen 
select 
case when trx_amt>=288 and trx_amt<388 then '1.With-Hand'
when trx_amt>=388 and trx_amt<588 then '2.With-Mimi'
when trx_amt>=588 and trx_amt<888 then '3.Blow-Jobbie'
when trx_amt>=888 and trx_amt<1288 then '4.Do-i'
when trx_amt=1288 then '5.Double-Fly'
else '6.other'
end as ser_typ,
count(1)as trx_cnt,
min(trx_time)as first_time
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;
2024-10-29 分类(1)姿势太多很过分,分类要用CaseWhen 
select * from cmb_usr_trx_rcd
where usr_id ='5201314520'
2024-10-29 分类(1)姿势太多很过分,分类要用CaseWhen 
select 
case when trx_amt=288 then '1.With-Hand'
when trx_amt=388 then '2.With-Mimi'
when trx_amt=588 then '3.Blow-Jobbie'
when trx_amt=888 then '4.Do-i'
when trx_amt=1288 then '5.Double-Fly'
else '6.other'
end as ser_typ,
count(1)as trx_cnt,
min(trx_time)as first_time
from cmb_usr_trx_rcd
group by ser_typ
order by ser_typ;
2024-10-29 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 mch_nm
order by trx_cnt desc;
2024-10-29 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;
2024-10-29 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'
2024-10-29 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
wheremch_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
2024-10-29 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 usr_id='5201314520'
and 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
2024-10-29 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 date(trx_time)between '2024-09-01'and '2024-09-30'
and mch_nm ='红玫瑰按摩保健休闲'
group by trx_date
order by trx_date asc
2024-10-29 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
	year(trx_time)='2024'
and usr_id ='5201314520'
group by mch_nm
order by sum_trx_amt desc
2024-10-29 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 date(trx_time)between '2024-09-01'and'2024-09-30'
and (hour(trx_time) >=22
	or hour(trx_time)between '0'and '5')
and usr_id ='5201314520'
 order by trx_time asc
2024-10-29 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 date(trx_time)between '2024-09-01'and'2024-09-30'
and (hour(trx_time) >=22
	or hour(trx_time)between '0'and '5')
 order by trx_time asc
2024-10-29 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 date(trx_time)between '2024-09-01'and'2024-09-30'
and (hour(trx_time) >=22
	and hour(trx_time)between '0'and '5')
 order by trx_time asc
2024-10-29 条件过滤(2)半夜活动有猫腻,Hour函数给给力 
select * from cmb_usr_trx_rcd
where date(trx_time)
between '2024-09-01'and '2024-09-30'
and hour(trx_time) between '1'and '5'
and usr_id='5201314520'
order by trx_time asc
2024-10-29 条件过滤(1)异地男友有异常,数分闺蜜来帮忙 
select * from cmb_usr_trx_rcd
where date(trx_time)
between '2024-09-01'and '2024-09-30'
and usr_id ='5201314520'
order by trx_time asc
2024-10-28 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 '2024-07-30'
group by
    trx_amt 
order by
    trx_cnt desc 
limit 5;
2024-10-28 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 year(trx_time) = 2024 
    and month(trx_time) in (1, 2, 3, 5, 6, 7) 
group by
    trx_amt 
order by
    trx_cnt desc 
limit 5;
2024-10-28 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 asc