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2026-05-09 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 ser_typ
2026-05-09 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_timefrom cmb_usr_trx_rcd 
where trx_amt >= 288
and usr_id=5201314520
group by usr_id, mch_nm
order by trx_cnt desc
2026-05-09 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
2026-05-09 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 date(trx_time) between '2023-01-01' and '2024-06-30'
group by
    trx_amt 
order by
    avg_trx_per_user desc 
limit 5;
2026-05-09 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
2026-05-09 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
2026-05-08 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), min(trx_amt) , avg(trx_amt), sum(trx_amt) from cmb_usr_trx_rcd wheremch_nm = '红玫瑰按摩保健休闲' anddate(trx_time) between '2024-09-01' and '2024-09-30' group by date(trx_time) order by date(trx_time)
2026-05-08 分组与聚合函数(2)擦边营收怎么样,聚合函数可看出 
select max(trx_amt), min(trx_amt) , avg(trx_amt), sum(trx_amt) from cmb_usr_trx_rcd wheremch_nm = '红玫瑰按摩保健休闲' and date(trx_time) between '2024-09-01' and '2024-09-30';
2026-05-08 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
2026-05-08 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 limit 7
2026-05-08 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) from cmb_usr_trx_rcd where year(trx_time) = 2024 group by mch_nm
2026-05-08 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) in (22,23,0,1,2,3,4,5) 
    and usr_id = '5201314520' 
order by trx_time
2026-05-08 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) in (22,23,24,1,2,3,4,5) 
    and usr_id = '5201314520' 
order by trx_time
2026-05-08 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 usr_id=5201314520 and date(trx_time) between '2024-9-1' and '2024-9-30' and time(trx_time) between '01:00:00' and '06:00:00' order by trx_time
2026-05-08 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 usr_id=5201314520 and date(trx_time) between '2024-9-1' and '2024-9-30' and hour(trx_time) between '01:00:00' and '06:00:00' order by trx_time
2026-05-08 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 usr_id=5201314520 and date(trx_time) between '2024-9-1' and '2024-9-30' and hour(trx_time) between '01:00:00' and '06:00:00';
2026-05-08 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 usr_id = 5201314520 and date(trx_time) between '2024-9-1' and '2024-9-30' order by trx_time
2026-05-08 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 usr_id = 5201314520 and trx_time between 2024-9-1 and 2024-9-30