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提交日期 题目名称 提交代码
2025-12-22 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 trx_time >= '2024-09-01'
AND trx_time < '2024-10-01'
AND HOUR(trx_time) >= 1
AND HOUR(trx_time) < 6
ORDER BY trx_time ASC;
2025-12-22 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 >= '2024-09-01'
AND trx_time < '2024-10-01'
ORDER BY trx_time ASC;
2025-12-21 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 mch_nm = '红玫瑰按摩保健休闲'
AND trx_time >= '2024-09-01'
AND trx_time < '2024-10-01'
GROUP BY DATE(trx_time)
ORDER BY trx_date ASC;
2025-12-21 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 usr_id=5201314520 AND year(trx_time) = 2024
group by mch_nm
order by sum_trx_amt desc
;
2025-12-21 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 usr_id=5201314520
group by mch_nm
order by sum_trx_amt desc
;
2025-12-21 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 usr_id=5201314520
group by mch_nm
;