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评论日期 题目名称 评论内容 站长评论
2025-01-08 分组与聚合函数(3)五花八门的项目,其实都有固定套路(1) 
and substring(trx_time,1,7) between '2024-01' and '2024-07'其实这样的写法也可以 那么可以回去试试 能不能通过前面的题
啥也没说

提交记录

提交日期 题目名称 提交代码
2025-01-09 子查询(1)玩的最嗨那天在做甚?要用Where子查询 
select
usr_id,mch_nm,trx_time,max(trx_amt)
from cmb_usr_trx_rcd
where usr_id ='5201314520'
and substring(trx_time,1,4) = '2024'
group by 1,2,3
order by 4 desc
limit 1
2025-01-09 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;
2025-01-09 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) as mch_cnt
from cmb_usr_trx_rcd
where mch_nm like '%按摩保健休闲%'
2025-01-09 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 1) as mch_cnt
from cmb_usr_trx_rcd
where mch_nm like '%按摩保健休闲%'
2025-01-09 字符串与通配符(1)名称里面有特服,可以使用通配符 
select
count(1) as mch_cnt
from cmb_usr_trx_rcd
where mch_nm like '%按摩保健休闲%'
2025-01-09 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' endser_typ
 ,sum(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 byser_typ
order byser_typ
2025-01-09 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 'other' endser_typ
 ,sum(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 byser_typ
order byser_typ
2025-01-09 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) as trx_amt
   ,sum(1) as trx_cnt
    ,min(trx_time) as first_time
from 
    cmb_usr_trx_rcd
where 
    usr_id='5201314520'
    and trx_amt>=288
group by usr_id, mch_nm
order by 4 desc
2025-01-09 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) as trx_amt ,sum(1) as trx_cnt, min(trx_time) as first_time
from cmb_usr_trx_rcd
where usr_id ='5201314520'
and trx_amt >=288
group by 1,2
order by 4 desc
2025-01-09 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) as trx_amt ,sum(1) as trx_cnt, min(trx_time) as first_time
from cmb_usr_trx_rcd
where usr_id ='5201314520'
and trx_amt >=288
group by 1,2
order by 4
2025-01-09 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
    mch_nm = '红玫瑰按摩保健休闲'
    and usr_id = '5201314520'
group by 1,3
2025-01-09 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select
    usr_id,
    max(trx_time) as first_time,  
    mch_nm
from
    cmb_usr_trx_rcd
where
    mch_nm = '红玫瑰按摩保健休闲'
    and usr_id = '5201314520'
2025-01-09 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select
    usr_id,
    max(trx_time) as first_time,  
    mch_nm
from
    cmb_usr_trx_rcd
where
    mch_nm = '红玫瑰按摩保健休闲'
    and usr_id = '5201314520'
group by
    usr_id, mch_nm;
2025-01-09 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),mch_nm
from cmb_usr_trx_rcd
where usr_id = '5201314520'
and mch_nm = '红玫瑰按摩保健休闲'
2025-01-09 分组与聚合函数(5)想知道何时成瘾,用Max Or Min? 
select
usr_id,min(date(trx_time)),mch_nm
from cmb_usr_trx_rcd
where usr_id = '5201314520'
and mch_nm = '红玫瑰按摩保健休闲'
2025-01-08 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 服务
,sum(1) 总消费笔数
,count(distinct usr_id) 服务客户数
,sum(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 substring(trx_time,1,7)between '2023-01' and '2024-06'
group by 服务
order by avg_trx_per_user desc
limit 5
2025-01-08 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 服务
,sum(1) 总消费笔数
,count(distinct usr_id) 服务客户数
,sum(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 服务
order by avg_trx_per_user desc
limit 5
2025-01-08 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 服务
,sum(1) 总消费笔数
,count(distinct usr_id) 服务客户数
,sum(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 '2023-12-31'
group by 服务
order by avg_trx_per_user desc
limit 5
2025-01-08 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 服务
,sum(1) 总消费笔数
,count(distinct usr_id) 服务客户数
,sum(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=31'
group by 服务
order by avg_trx_per_user desc
limit 5
2025-01-08 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 服务
,sum(1) 总消费笔数
,count(distinct usr_id) 服务客户数
,sum(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 服务
order by avg_trx_per_user desc
limit 5