- Given a reimbursement table, make the following data requirements corresponding SQL implementation
- Title: seek reimbursement of all the details sorted obtain reimbursement of the times is a personal reimbursement of how many times, how many times topN the reimbursement of all claims came in time?
- Answer:
- Data table, the table name is analysis_daily_expense, to intermediate "\ t" of the partition
工号(workno) 姓名(name) 报销项(item) 费用(cost) 时间(orderdate)
t001 张一 水费 100 2017-06-01 09:00:00
t002 张二 团建 500 2017-07-02 09:00:00
t003 张三 市场 1700 2017-08-01 09:00:00
t004 张四 维修 150 2017-08-11 09:00:00
t005 张五 出差 800 2017-08-21 11:00:00
t005 张五 市场 1000 2017-09-29 11:00:00
t005 张五 福利 300 2017-09-29 11:00:00
t004 张四 市场 300 2018-01-05 11:00:00
t004 张四 市场 550 2018-01-06 09:00:00
t003 张三 维修 90 2018-02-01 09:00:00
t002 张二 电费 200 2018-02-05 09:00:00
t002 张二 团建 300 2018-02-08 15:00:00
t005 张五 市场 1280 2018-03-07 15:00:00
t005 张五 市场 2280 2018-04-07 15:00:00
t002 张二 维修 230 2018-04-01 15:00:00
t004 张四 福利 200 2018-04-28 15:00:00
t004 张四 福利 1000 2017-12-30 15:00:00
t004 张四 福利 10000 2018-02-13 15:00:00
- sql realization
//重点考查row_number,rank,dense_rank数据排序使用
select workno,name,cost,orderdatetime,row_number() over(partition by name order by orderdatetime asc) as person,rank() over(order by orderdatetime asc) as topN_1, dense_rank() over(order by orderdatetime asc) as topN_2from analysis_daily_expense;
- Demonstration effect
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