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提交日期 题目名称 提交代码
2026-03-31 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 sum_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
    date(trx_time)
order by
    trx_date;
2026-03-31 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
	year(trx_time) = 2024
and usr_id = '5201314520'
group by
	mch_nm
order by
	sum_trx_amt desc
2026-03-31 渣男腰子可真行，端午中秋干不停  
select * from cmb_usr_trx_rcd
where (
	date(trx_time) between '2024-06-08' and '2024-06-10'
or date(trx_time) between '2024-09-15' and '2024-09-17'
)
and usr_id = '5201314520'
order by trx_time
2026-03-31 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
2026-03-31 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 date(trx_time) between '2024-09-01' and '2024-09-30'
and hour(trx_time) between 1 and 5
and usr_id = '5201314520'
order by trx_time
2026-03-31 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 date(trx_time) between '2024-09-01' and '2024-09-30'
and usr_id = '5201314520'
order by trx_amt