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提交日期 题目名称 提交代码
2024-11-08 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%"
2024-11-08 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(usr_id) 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 asc
2024-11-08 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_type,count(usr_id) 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_type
order by ser_type asc
2024-11-08 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_type,count(usr_id) trx_cnt,min(date(trx_time)) first_time from cmb_usr_trx_rcd
where usr_id=5201314520 and mch_nm='红玫瑰按摩保健休闲'
group by ser_type
order by ser_type asc
2024-11-08 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_type,count(usr_id) trx_cnt,min(date(trx_time)) first_time 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 ser_type asc
limit 6
2024-11-07 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(mch_nm) 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
2024-11-07 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select usr_id,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
2024-11-07 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_cnt,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
2024-11-07 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_cnt,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
2024-11-07 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_cnt,count(distinct usr_id) unique_usr_cnt,count(1)/count(distinct usr_id) avg_trx_per_user from cmb_usr_trx_rcd
where trx_time between '2023-01-01' and '2024-06-30'
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
2024-11-07 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) 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 count(trx_amt) desc
limit 5
2024-11-07 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) as 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 trx_time between '2024-09-01' and '2024-09-30'
and mch_nm='红玫瑰按摩保健休闲'
group by date(trx_time)
order by trx_date asc
2024-11-07 分组与聚合函数(2)擦边营收怎么样,聚合函数可看出 
select 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 (
select *,date(trx_time) trx_date from cmb_usr_trx_rcd
where trx_time between '2024-09-01' and '2024-09-30'
and mch_nm='红玫瑰按摩保健休闲') t
group by trx_date
order by trx_date asc
2024-11-07 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 year(trx_time) = 2024
group by usr_id,mch_nm,year(trx_time)
having usr_id=5201314520 
order by sum_trx_amt desc
2024-11-07 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
group by usr_id,mch_nm,year(trx_time)
having usr_id=5201314520
order by sum_trx_amt desc
2024-11-07 分组与聚合函数(1)Money全都花在哪,GroupBy来查一查 
select usr_id,mch_nm,sum(trx_amt) sum_trx_amt from cmb_usr_trx_rcd
group by usr_id,mch_nm,year(trx_time)
having usr_id=5201314520
order by sum_trx_amt desc
2024-11-07 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
group by usr_id,mch_nm
having usr_id=5201314520
order by sum_trx_amt desc
2024-11-07 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)>=22)
or (hour(trx_time) between 0 and 5))
and usr_id='5201314520'
order by trx_time asc
2024-11-07 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)>=22)
or (hour(trx_time) between 0 and 5)
and usr_id='5201314520'
order by trx_time asc
2024-11-07 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)>=22)
and (hour(trx_time) between 0 and 5)
and usr_id='5201314520'
order by trx_time asc