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提交日期 题目名称 提交代码
2025-03-14 德州扑克起手牌-最强起手牌KK+ 
select * 
from hand_permutations 
where 
 concat(card1,card2) like '%A%A%' or
 concat(card1,card2) like '%K%K%' or
 concat(card1,card2) like '%A%K%' or
 concat(card1,card2) like '%K%A%' 
order by id
2025-03-04 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;
2025-02-09 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) mch_nm
from cmb_usr_trx_rcd 
where 
 mch_nm like '%按摩保健休闲%'
2025-02-09 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 ser_typ,
 count(1) trx_cnt,
 min(date(trx_time)) 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
2025-02-09 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 ser_typ,
 count(1) trx_cnt,
 min(date(trx_time)) 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
2025-02-09 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 ser_typ,
 count(1) trx_cnt,
 min(date(trx_time)) 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
2025-02-09 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) trx_amt,
 count(1) trx_cnt,
 min(trx_time) first_time
from cmb_usr_trx_rcd 
where 
 usr_id = '5201314520'
 and trx_amt >= 288
group by mch_nm
order by trx_cnt desc
2025-02-08 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) 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'
order by trx_time
2025-02-08 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) 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'
order by trx_time
limit 1;
2025-02-08 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) total_trx_amt,
 count(distinct usr_id) unique_usr_cnt,
 count(1) / count(distinct usr_id) 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;
2025-02-08 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) total_trx_amt,
 count(distinct usr_id) unique_usr_cnt,
 count(1) / count(distinct usr_id) 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;
2025-02-08 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) total_trx_amt,
 count(distinct usr_id) unique_usr_cnt,
 count(1) / count(distinct usr_id) avg_trx_per_user
from cmb_usr_trx_rcd 
where 
 mch_nm ='红玫瑰按摩保健休闲'
 and trx_time between '2023-01-01' and '2024-06-30'
group by 
 trx_amt
order by avg_trx_per_user desc
limit 5;
2025-02-08 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) total_trx_amt,
 count(distinct usr_id) unique_usr_cnt,
 count(1) / count(distinct usr_id) avg_trx_per_user
from cmb_usr_trx_rcd 
where 
 mch_nm ='红玫瑰按摩保健休闲'
 and trx_time between '2023-01-01' and '2024-06-30'
group by 
 trx_amt
order by trx_amt desc
limit 5;
2025-02-08 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(1) 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) between 1 and 7
group by trx_amt
order by trx_cnt desc
limit 5
2025-02-08 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) trx_date,
 max(trx_amt) max_trx_amt,
 min(trx_amt) min_trx_amt,
 avg(trx_amt) avg_trx_amt,
 sum(trx_amt) 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
2025-02-08 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) 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
2025-02-08 分组与聚合函数(1)Money全都花在哪,GroupBy来查一查 
select mch_nm , sum(trx_time) 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
2025-02-08 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 usr_id = '5201314520'
 and date(trx_time) between '2024-09-01' and '2024-09-30'
 and (hour(trx_time) between 22 and 24
 or hour(trx_time) between 0 and 5)
order by trx_time
2025-02-08 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 usr_id = '5201314520'
 and date(trx_time) between '2024-09-01' and '2024-09-30'
 and hour(trx_time) between 22 and 24
 and hour(trx_time) between 0 and 5
order by trx_time
2025-02-08 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 '2024-09-01' and '2024-09-30'
 and hour(trx_time) between 1 and 5
order by trx_time