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提交日期 题目名称 提交代码
2024-11-22 销售金额前10的商品信息 
with ranked_sales as (
    select 
        goods_id, 
        sum(order_gmv) as total_gmv,
        rank() over (order by sum(order_gmv) desc) as ranking
    from 
       order_info
    where 
        date(order_time) = '2024-09-10'
    group by 
        goods_id
)
select 
    goods_id, 
    total_gmv, 
    ranking
from 
    ranked_sales
where 
    ranking <= 10
order by 
    ranking, 
    total_gmv desc;
2024-11-22 绘制小时进入人数曲线 
SELECT 
    hour(enter_time) AS hour_entered,
    COUNT(*) AS enter_count
FROM 
    ks_live_t1
GROUP BY 
    hour_entered
ORDER BY 
    hour_entered;
2024-11-22 表连接(2)渣男去过我对象没去过,那就用LeftJoin 
select a.mch_nm as asshole_tried,a.trx_cnt as trx_cnt , b.mch_nm as darling_tried
from 
(select mch_nm ,count(1) as trx_cnt from cmb_usr_trx_rcd where year(trx_time) in (2023,2024) and usr_id='5201314520' group by mch_nm having trx_cnt >=20 )a
left join 
(select distinct mch_nm from cmb_usr_trx_rcd where year(trx_time) in (2023,2024)and usr_id='5211314521')b
on a.mch_nm = b.mch_nm order by trx_cnt desc
2024-11-22 表连接(2)渣男去过我对象没去过,那就用LeftJoin 
select a.mch_nm as asshole_tried,a.trx_cnt as trx_cnt , b.mch_nm as darling_tried
from 
(select mch_nm ,count(1) as trx_cnt from cmb_usr_trx_rcd where year(trx_time) in (2023,2024) and usr_id='5201413520' group by mch_nm having trx_cnt >=20 )a
left join (select distinct mch_nm from cmb_usr_trx_rcd where year(trx_time) in (2023,2024)and usr_id='5211314521')b
on a.mch_nm = b.mch_nm order by trx_cnt desc
2024-11-22 表连接(1)你们难道都去过?那就试试用InnerJoin 
select a.mch_nmfrom
(select distinct mch_nm from cmb_usr_trx_rcd where usr_id='5201314520'and year(trx_time)=2024) a 
inner join 
(select distinct mch_nm from cmb_usr_trx_rcd where usr_id='5211314521'and year(trx_time)=2024) b 
on a.mch_nm = b.mch_nm 
order by 1 desc
2024-11-22 表连接(1)你们难道都去过?那就试试用InnerJoin 
select a.mch_nmfrom
(select distinct mch_nm from cmb_usr_trx_rcd where usr_id='5201314520'and year(trx_time)=2024) a 
left join 
(select distinct mch_nm from cmb_usr_trx_rcd where usr_id='5211314521'and year(trx_time)=2024) b 
on a.mch_nm = b.mch_nm 
order by 1 desc
2024-11-22 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,trx_amt 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 usr_id='5201314520' and year(trx_time)=2024
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) as 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
2024-11-22 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(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 trx_cnt desc
2024-11-22 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(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 trx_cnt desc limit 5
2024-11-22 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(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 mch_nm,usr_id order by trx_cnt desc limit 5
2024-11-22 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(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 mch_nm,usr_id order by trx_cnt desc limit 5
2024-11-22 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(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 mch_nm order by trx_cnt desc limit 5
2024-11-22 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(1) as trx_cnt, min(trx_time) as first_time 
from cmb_usr_trx_rcd 
where usr_id='5201314520' group by mch_nm order by trx_cnt desc
2024-11-22 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,  
    mch_nm
from
    cmb_usr_trx_rcd
where
    mch_nm = '红玫瑰按摩保健休闲'
    and usr_id = '5201314520'
2024-11-22 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'
2024-11-22 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
    usr_id, mch_nm;
2024-11-22 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 time,mch_nm from cmb_usr_trx_rcd where usr_id = '5201314520' and mch_nm='红玫瑰按摩保健休闲'
2024-11-22 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 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