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提交日期 题目名称 提交代码
2024-10-30 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 cmb_usr_trx_rcd
where mch_nm like '%按摩保健休闲%'
2024-10-30 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 cmb_usr_trx_rcd
where mch_nm like '%按摩保健休闲%'
2024-10-30 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 cmb_usr_trx_rcd
where mch_nm like '按摩%保健休闲%'
2024-10-30 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(trx_amt) as trx_cnt,
date(min(trx_time)) as first_date
from cmb_usr_trx_rcd
where mch_nm = '红玫瑰按摩保健休闲' and usr_id = '5201314520'
group by ser_typ
order by ser_typ
2024-10-30 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_amt) as trx_cnt,
 min(trx_time) as first_time
from cmb_usr_trx_rcd
where trx_amt >= 288 and usr_id = '5201314520'
group by usr_id,mch_nm
order by trx_cnt desc
2024-10-30 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_amt1,
 count(trx_amt) as trx_cnt,
 min(trx_time) as first_time
from cmb_usr_trx_rcd
where trx_amt >= 288 and usr_id = '5201314520'
group by usr_id,mch_nm
order by trx_cnt desc
2024-10-30 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_amt1,
 count(trx_amt) as trx_cnt,
 min(trx_time) as first_time
from cmb_usr_trx_rcd
where trx_amt >= 288 and usr_id = '5201314520'
group by mch_nm
order by trx_cnt desc
2024-10-30 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'
2024-10-30 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(trx_amt) as total_trx_cnt,
 count(distinct usr_id) as unique_usr_cnt,
 count(trx_amt)/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
2024-10-30 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(trx_amt) as total_trx_cnt,
 count(distinct usr_id) as unique_usr_cnt,
 count(trx_amt)/count(distinct usr_id) as avg_trx_per_user
from cmb_usr_trx_rcd
group by trx_amt
order by avg_trx_per_user 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(1) as trx_cnt
from cmb_usr_trx_rcd
where year(trx_time)=2024
and month(trx_time) between 1 and 7
and mch_nm = '红玫瑰按摩保健休闲'
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 trx_date
order by trx_date
2024-10-28 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
2024-10-28 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 0 and 5
or hour(trx_time) between 22 and 23)
order by trx_time
2024-10-28 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 time(trx_time) between '01:00:00' and '06:00:00'
order by trx_time
2024-10-28 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 time(trx_time) between '01:00:00' and '05:00:00'
order by trx_time
2024-10-28 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 '2024-09-01' and '2024-09-30'
order by trx_time
2024-10-28 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
order by trx_time