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全部文章（共175篇）

题解 | 下单最多的商品

select t1.product_id, pdiff as cnt from( select product_id, pdiff, dense_rank()over(order by pdiff desc,product_id asc) as py from( select product_...

2025-02-20

0 120

题解 | 完成员工考核试卷突出的非领导员工

with tiaojian as ( select ed.emp_id, eo.exam_id, emp_level, eo.tag, ed.score, timestampdiff(minute,start_time,submit_time) as pt, avg(score)over(part...

2025-02-20

0 99

题解 | 统计加班员工占比

select sb.department, concat( round( ( count(distinct case when timestampdiff(second,first_clockin,last_clockin)/3600>9.5 then sb.staff_id end)/c...

2025-02-18

0 86

题解 | 查询单日多次下订单的用户信息？

with tiaojian as ( select t.order_date, t.user_id, order_nums from( select date(order_time) as order_date, user_id, count(order_id) as order_nums, d...

2025-02-18

0 103

题解 | 统计用户获得积分

select user_id, floor(sum(timestampdiff(minute,visit_time,leave_time))/10)*1 as point from visit_tb group by user_id order by point desc

2025-02-17

1 74

题解 | 统计员工薪资扣除比例

select sb.staff_id, sb.staff_name, concat( round( ( sum(dock_salary)/sum(normal_salary))*100,1),"%") as dock_ratio from staff_tb sb inner j...

2025-02-17

0 102

题解 | #10月的新户客单价和获客成本#

with tiaojian as ( select uid, order_id, total_amount from( select uid, order_id, total_amount, date_format(event_time,"%Y%m") as month, d...

2024-10-18

0 104

题解 | #连续签到领金币#

with tiaojian as ( select uid, date(in_time) as pday from tb_user_log where artical_id=0 and sign_in=1 and date(in_time) between "2021-07-07&q...

2024-10-17

0 64

题解 | #计算用户的平均次日留存率#

#1.一个人多次留存也算，比如用户 user_id=1001,date=12 13 14 这种算2次。 #2.计算公式是每人每天的总和，比如user_id=1001,date 12 and user_id=1001,date 13 这算2天（user_id=1002,date=12,这种应该算3天）...

2024-09-26

0 124

题解 | #每篇文章同一时刻最大在看人数#

with tiaojian as ( select artical_id,in_time as ptime from tb_user_log where artical_id<>0 union select artical_id,out_time as ptime from tb_us...

2024-09-26

0 131