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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 
reg_rules,
count(distinct mch_nm) as mch_cnt
from(select mch_nm,
 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|养生|SPA|会所).*' then "按摩、保健、休闲、养生、SPA、会所"
 else "其他"
 end as reg_rules
 from cmb_usr_trx_rcd
 where lower(mch_nm) rlike '.*(按摩|保健|休闲|养生|SPA|会所).*'
 or mch_nm like '%按摩保健休闲%')as t
group by reg_rules
order by mch_cnt desc
2025-01-06 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 (
select mch_nm
from cmb_usr_trx_rcd
where mch_nm like '%按摩保健休闲%'
) as t;
2024-12-31 分类(1)姿势太多很过分,分类要用CaseWhen 
select
ser_typ,
count(1) as trx_cnt,
min(first_time) as first_date
from(
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,
date(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"
)t
group by ser_typ
order by ser_typ
2024-12-31 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 4 desc
2024-12-27 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
 year(trx_time) = "2024"
 and month(trx_time) = "9"
 and mch_nm = "红玫瑰按摩保健休闲"
 group by date(trx_time)
 order by trx_date
2024-12-27 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
2024-12-26 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) in(22,23,24,0,1,2,3,4,5)
order by trx_time
2024-12-26 条件过滤(2)半夜活动有猫腻,Hour函数给给力 
select usr_id,
mch_nm,
trx_time,
trx_amt
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 1 and 5
order by trx_time
2024-12-26 条件过滤(2)半夜活动有猫腻,Hour函数给给力 
select usr_id,
mch_nm,
trx_time,
trx_amt
from cmb_usr_trx_rcd
where
usr_id = "5201315520" and
date(trx_time) between "2024-09-01" and "2024-09-30" or
hour(trx_time) between 1 and 5
order by trx_time
2024-12-26 条件过滤(2)半夜活动有猫腻,Hour函数给给力 
select usr_id,
mch_nm,
trx_time,
trx_amt
from cmb_usr_trx_rcd
where
usr_id = "5201315520" and
date(trx_time) between "2024-09-01" and "2024-09-30" and
hour(trx_time) between 1 and 5
order by trx_time
2024-12-26 条件过滤(2)半夜活动有猫腻,Hour函数给给力 
select usr_id,
mch_nm,
trx_time,
trx_amt
from cmb_usr_trx_rcd
where
usr_id = 5201315520 and
date(trx_time) between "2024-09-01" and "2024-09-30" and
hour(trx_time) between "01:00:00" and "06:00:00" 
order by trx_time
2024-12-25 销售金额前10的商品信息 
select goods_id,
sum(order_gmv) as total_gmv
from order_info
where date(order_time) = "2024-09-10"
group by goods_id
order by total_gmv desc
limit 10;