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提交日期 题目名称 提交代码
2026-03-30 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)) mch_nm
FROM cmb_usr_trx_rcd
WHERE mch_nm LIKE '%按摩保健休闲%';
2026-03-30 分类(1)姿势太多很过分,分类要用CaseWhen 
select 
case when trx_amt > 0 AND trx_amt <= 288 then '1.WithHand'
when trx_amt BETWEEN 289 AND 388 then '2.WithMimi' 
when trx_amt BETWEEN 389 AND 588 then '3.BlowJobbie	' 
when trx_amt BETWEEN 589 AND 888 then '4.Doi' 
when trx_amt BETWEEN 889 AND 1288 then '5.DoubleFly'
when trx_amt>=1288 then '6.other' 
end 
as set_typ,
count(case when trx_amt > 0 AND trx_amt <= 288 then '1.WithHand'
when trx_amt BETWEEN 289 AND 388 then '2.WithMimi' 
when trx_amt BETWEEN 389 AND 588 then '3.BlowJobbie	' 
when trx_amt BETWEEN 589 AND 888 then '4.Doi' 
when trx_amt BETWEEN 889 AND 1288 then '5.DoubleFly'
when trx_amt>=1288 then '6.other' 
end ) as 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 set_typ
order by set_typ;
2026-03-30 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),
count(trx_amt) 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;
2026-03-30 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,
trx_amt,
count(trx_amt) 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, trx_amt
order by trx_cnt desc;
2026-03-30 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),
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 ;
2026-03-30 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) total_trx_cnt,count(distinct(usr_id))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 '2023-1-1'AND '2024-6-30' group by trx_amt order by avg_trx_per_user desc limit 5;
2026-03-30 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) total_trx_cnt,count(distinct(usr_id))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 '2023-1-1'AND '2024-6-30' group by trx_amt order by avg_trx_per_user desc;
2026-03-29 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 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;
2026-03-29 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) 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 
WHEREYEAR(trx_time) = 2024 
AND MONTH(trx_time) = 9 
AND mch_nm = '红玫瑰按摩保健休闲' 
GROUP BY trx_date 
ORDER BY trx_date;
2026-03-29 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) 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 usr_id = 5201314520 
AND YEAR(trx_time) = 2024 
AND MONTH(trx_time) = 9 
AND mch_nm = '红玫瑰按摩保健休闲' 
GROUP BY trx_date 
ORDER BY trx_date;
2026-03-29 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), 
MAX(trx_amt), 
MIN(trx_amt), 
AVG(trx_amt), 
SUM(trx_amt) 
FROM cmb_usr_trx_rcd 
WHERE usr_id = 5201314520 
AND YEAR(trx_time) = 2024 
AND MONTH(trx_time) = 9 
AND mch_nm = '红玫瑰按摩保健休闲' 
GROUP BY DATE(trx_time) 
ORDER BY DATE(trx_time);
2026-03-29 分组与聚合函数(2)擦边营收怎么样,聚合函数可看出 
select * from cmb_usr_trx_rcd where usr_id= 5201314520;
2026-03-29 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) s1 from cmb_usr_trx_rcd where usr_id = 5201314520 and year(trx_time) = 2024 group by mch_nm order by s1 desc ;
2026-03-29 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) from cmb_usr_trx_rcd where usr_id = 5201314520 group by mch_nm;
2026-03-29 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) between 22 and 23 or time(trx_time) between '00:00:00' and '06:00:00')
and usr_id = '5201314520' 
order by trx_time
2026-03-29 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) between 22 and 23 or time(trx_time) between '00:00:00' and '05:00:00')
and usr_id = '5201314520' 
order by trx_time
2026-03-29 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 trx_time >= '2024-09-01 22:00:00'
AND trx_time < '2024-09-30 05:00:01' 
ORDER BY trx_time;
2026-03-29 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) between 22 and 23 or hour(trx_time) between 0 and 5)
and usr_id = '5201314520' 
order by trx_time
2026-03-29 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 22 AND 23
 OR hour(trx_time) BETWEEN 0 AND 4)
ORDER BY trx_time;
2026-03-29 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) between 22 and 23 or hour(trx_time) between 0 and 4)
and usr_id = '5201314520' 
order by trx_time