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提交日期 题目名称 提交代码
2026-01-27 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 total_trx_amt
 FROM 
 	cmb_usr_trx_rcd
 WHERE 
	date(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
2026-01-27 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 total_trx_amt
 FROM 
 	cmb_usr_trx_rcd
 WHERE 
 	usr_id='5201314520' AND 
	date(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
2026-01-27 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_rcdWHERE YEAR(trx_time)='2024'AND usr_id='5201314520' group by mch_nm
2026-01-27 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_rcdWHERE YEAR(trx_time)='2024' group by mch_nm
2026-01-27 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) <=5 OR HOUR(trx_time)>=22)
2026-01-27 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) <=5 OR HOUR(trx_time)>=22
2026-01-27 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 
	usr_id='5201314520' AND 
DATE(trx_time) BETWEEN '2024-09-01' AND '2024-09-30' AND 
HOUR(trx_time) BETWEEN 1 AND 5 
ORDER BY 
	trx_time
2026-01-27 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 
	usr_id='5201314520' AND 
DATE(trx_time) BETWEEN '2024-09-01' AND '2024-09-30' AND 
HOUR(trx_time) BETWEEN 1 AND 6 
ORDER BY 
	trx_time
2026-01-27 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 
	usr_id ='5201314520' AND
DATE(trx_time) BETWEEN '2024-09-01' AND '2024-09-30'
ORDER BY trx_time
2026-01-27 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 
	usr_id ='5201314520' AND
trx_time BETWEEN '2024-09-01' AND '2024-09-30'
ORDER BY trx_time
2026-01-27 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 
	trx_time BETWEEN '2024-09-01' AND '2024-09-30'
ORDER BY trx_time
2026-01-27 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 
	trx_time BETWEEN '2024-09-01' AND '2024-09-30'