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提交日期 题目名称 提交代码
2024-11-22 子查询(1)玩的最嗨那天在做甚?要用Where子查询 
select * from cmb_usr_trx_rcd
where trx_amt = (select max(trx_amt)
 from cmb_usr_trx_rcd
 where usr_id='5201314520'
 and year(trx_time)='2024')
and year(trx_time)=2024
and usr_id='52201314520';
2024-11-22 子查询(1)玩的最嗨那天在做甚?要用Where子查询 
select * 
from cmb_usr_trx_rcd
where 
trx_amt=(select max(trx_amt)
 from cmb_usr_trx_rcd
 where usr_id='5201314520'
 and year(trx_time)='2024')
and year(trx_time)='2024'
and usr_id='52201314520';
2024-11-22 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_cnt
from cmb_usr_trx_rcd 
where mch_nm like '%按摩保健休闲%';
2024-11-22 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;
2024-11-21 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 usr_id,ser_typ
order by trx_cnt desc;
2024-11-21 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 trx_amt
order by trx_cnt desc;
2024-11-21 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 usr_id,trx_amt
order by trx_cnt desc;
2024-11-21 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 usr_id,mch_nm
order by trx_cnt desc;
2024-11-10 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;
2024-11-08 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) 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
date(trx_time) between '2023-01-01' and '2024-6-30'
and mch_nm='红玫瑰按摩保健休闲'
group by trx_amt
order by avg_trx_per_user desc
limit 5
2024-11-08 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) 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 (1,2,3,4,5,6,7)
group by trx_amt
order by trx_cnt desc
limit 5;
2024-11-08 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) 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;
2024-11-08 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 usr_id='5201314520'
and year(trx_time)=2024
group by 
mch_nm
order by 
sum_trx_amt desc;
2024-11-01 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 time(trx_time)
not between '06:00:00' and '22:00:00'
and usr_id='5201314520'
order by trx_time
2024-11-01 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
time(trx_time)
between 
'01:00:00' and '06:00:00'
and date(trx_time)
between
'2024-09-01' and '2024-09-30'
and usr_id='5201314520'
order by
trx_time
2024-11-01 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 00:00:00' and '2024-10-01 00:00:00'
and usr_id='5201314520'
order by trx_time