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提交日期 题目名称 提交代码
2026-08-09 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(*) as trx_cnt from cmb_usr_trx_rcd where mch_nm='红玫瑰按摩保健休闲' and trx_time >= '2024-1-1' and trx_time <= '2024-7-31' group by trx_amt order by trx_cntdesclimit 5;
2026-08-09 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(*) as trx_cnt from cmb_usr_trx_rcd where mch_nm='红玫瑰按摩保健休闲' and trx_time >= '2024-1-1' and trx_time <= '2024-7-31' group by trx_amtlimit 5;
2026-08-09 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),min(trx_amt), avg(trx_amt), sum(trx_amt) from cmb_usr_trx_rcd where mch_nm ='红玫瑰按摩保健休闲' and trx_time >='2024-9-1' and trx_time <'2024-10-1' group by date(trx_time) order by trx_date
2026-08-09 分组与聚合函数（2）擦边营收怎么样，聚合函数可看出  
selectmax(trx_amt),min(trx_amt), avg(trx_amt), sum(trx_amt) from cmb_usr_trx_rcd where mch_nm ='红玫瑰按摩保健休闲' and trx_time >='2024-9-1' and trx_time <'2024-10-1' group by date(trx_time)
2026-08-09 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' and trx_time >='2024-1-1' and trx_time <'2025-1-1' group by mch_nm
2026-08-09 分组与聚合函数（1）Money全都花在哪，GroupBy来查一查  
selectmch_nm , count(trx_amt) as sum_trx_amt from cmb_usr_trx_rcdwhere usr_id ='5201314520' and trx_time >= '2024-1-1' and trx_time < '2025-1-1'group by mch_nm
2026-08-09 分组与聚合函数（1）Money全都花在哪，GroupBy来查一查  
selectmch_nm ,count(trx_amt) as sum_trx_amt from cmb_usr_trx_rcdwhere usr_id ='5201314520'group by mch_nm
2026-08-09 分组与聚合函数（1）Money全都花在哪，GroupBy来查一查  
selectmch_nm ,count(trx_amt) as sum_trx_amt from cmb_usr_trx_rcd group by mch_nm
2026-08-09 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 >= '2024-9-1' and trx_time < '2024-10-1' and (hour(trx_time) >= 22 or hour(trx_time) <= 5)
2026-08-09 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 >= '2024-9-1' and trx_time < '2024-10-1' and hour(trx_time) >= 22 or hour(trx_time) <= 5
2026-08-09 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 >= '2024-9-1' and trx_time < '2024-10-1' and hour(trx_time) >= 22 and hour(trx_time) <= 5
2026-08-09 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 >= '2024-9-1' and trx_time<'2024-10-1' and hour(trx_time) between 1 and 5
2026-08-09 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 >= '2024-9-1' and trx_time <'2024-10-1'