MySQL 根据当前日期动态分配月份

Question

希望你一切顺利..我正在尝试转换计划 table 如下

Input                                                   
Segment | Model |FC1 |FC2 |FC3 |FC4 |FC5 |  FC6 | FC7 | FC8 | FC9 | FC10 |  FC11 | FC12
HRX P3412   9   14  11  22  17  23  18  15  23  12  12  19
SRX O321    11  8   8   9   9   16  19  7   22  12  11  15
SRX LD12    14  10  20  22  18  19  10  17  21  16  10  21
HRX M421    17  18  16  12  14  17  10  16  8   8   7   23
MRX N342    3   23  16  13  20  9   16  14  16  17  10  11
HRX J231    4   10  20  20  21  23  17  22  14  15  8   22

根据当前日期和参考table

进入下面的table

Segment |Model| Apr-22 |May-22 |Jun-22 |Jul-22 |Aug-22 |Sep-22|Oct-22|Nov-22    | Dec-22 |  Jan-23 |Feb-23 |Mar-23
HRX P3412   9   14  11  22  17  23  18  15  23  12  12  19
SRX O321    11  8   8   9   9   16  19  7   22  12  11  15
SRX LD12    14  10  20  22  18  19  10  17  21  16  10  21
HRX M421    17  18  16  12  14  17  10  16  8   8   7   23
MRX N342    3   23  16  13  20  9   16  14  16  17  10  11
HRX J231    4   10  20  20  21  23  17  22  14  15  8   22

引用table:

Fiscal Month    From    to
Jan-22  Dec 26 2021     Jan 22 2022
Feb-22  Jan 23 2022 19-Feb-22
Mar-22  20-Feb-22   26-Mar-22
Apr-22  27-Mar-22   23-Apr-22
May-22  24-Apr-22   21-May-22
Jun-22  22-May-22   25-Jun-22
Jul-22  26-Jun-22   23-Jul-22
Aug-22  24-Jul-22   20-Aug-22
Sep-22  21-Aug-22   24-Sep-22
Oct-22  25-Sep-22   22-Oct-22
Nov-22  23-Oct-22   19-Nov-22
Dec-22  20-Nov-22   31-Dec-22

所以我需要根据当前日期基本上将列名称（FC1、FC2、FC3...输入 table）映射到会计月份，并查找参考 table财政月...你能帮我吗..

列名称应根据引用 table 在每个财政月动态更改。例如，从 2022 年 4 月 24 日起，FC1 应重命名为 2022 年 5 月，FC2 应重命名为 2022 年 6 月...同样从 2022 年 5 月 22 日起，FC1 应更名为 2022 年 6 月，FC2 应更名为 2022 年 7 月...

请查找 table 的 DDL：

create table input
(segment varchar(40),
model varchar (40),
FC1 int,
FC2 int,
FC3 int,
FC4 int,
FC5 int,
FC6 int,
FC7 int,
FC8 int,
FC9 int,
FC10 int,
FC11 int,
FC12 int)

insert into input values
('HRX','P3412','9','14','11','22','17','23','18','15','23','12','12','19'),
('SRX','O321','11','8','8','9','9','16','19','7','22','12','11','15'),
('SRX','LD12','14','10','20','22','18','19','10','17','21','16','10','21'),
('HRX','M421','17','18','16','12','14','17','10','16','8','8','7','23'),
('MRX','N342','3','23','16','13','20','9','16','14','16','17','10','11'),
('HRX','J231','4','10','20','20','21','23','17','22','14','15','8','22')

create table output
(segment varchar(40),
model varchar(40),
Apr2022 int,
May2022 int,
Jun2022 int,
jul2022 int,
aug2022 int,
sep2022 int,
oct2022 int,
nov2022 int,
dec2022 int,
Jan2023 int,
feb2023 int,
mar2023 int)

insert into output values
('HRX','P3412','9','14','11','22','17','23','18','15','23','12','12','19'),
('SRX','O321','11','8','8','9','9','16','19','7','22','12','11','15'),
('SRX','LD12','14','10','20','22','18','19','10','17','21','16','10','21'),
('HRX','M421','17','18','16','12','14','17','10','16','8','8','7','23'),
('MRX','N342','3','23','16','13','20','9','16','14','16','17','10','11'),
('HRX','J231','4','10','20','20','21','23','17','22','14','15','8','22')

create table reference
(fiscalmonth varchar(40),
from date,
to date
)

insert into reference values
('Jan 2022','Dec 26 2021 ','Jan 22 2022'),
('Feb 2022','Jan 23 2022','Feb 19 2022'),
('March 2022','feb 20 2022','Mar 26 2022'),
('April 2022','Mar 27 2022','Apr 23 2022'),
('May 2022','Apr 24 2022','May 21 2022'),
('June 2022','May 22 2022','Jun 25 2022'),
('July 2022','June 26 2022','Jul 23 2022'),
('Aug 2022','Jul 24 2022','Aug 20 2022'),
('Sep 2022','Aug 21 2022','Sep 24 2022'),
('Oct 2022','Sep 25 2022','Oct 22 2022'),
('Nov 2022','Oct 23 2022','Nov 19 2022'),
('Dec 2022','Nov 20 2022','Dec 31 2022')

Answer 1

我们可以获取从当前月份开始的前 12 行，并使用 row_number 对它们进行编号。然后我们使用 rn 进行手动数据透视，这样它就不需要逐月更改。
唯一需要保持更新的是参考文献 table。（我使用与 2022 年相同的日期为 2023 年添加了几个月。

select
  '' segment,
  '' model,
  max(case when rn = 1  then fiscalmonth end) FC1,
  max(case when rn = 2  then fiscalmonth end) FC2,
  max(case when rn = 3  then fiscalmonth end) FC3,
  max(case when rn = 4  then fiscalmonth end) FC4,
  max(case when rn = 5  then fiscalmonth end) FC5,
  max(case when rn = 6  then fiscalmonth end) FC6,
  max(case when rn = 7  then fiscalmonth end) FC7,
  max(case when rn = 8  then fiscalmonth end) FC8,
  max(case when rn = 9  then fiscalmonth end) FC9,
  max(case when rn = 10  then fiscalmonth end) FC10,
  max(case when rn = 11  then fiscalmonth end) FC11,
  max(case when rn = 12  then fiscalmonth end) FC12
from
(select 
  row_number() over (order by to_ ) as rn,
  fiscalmonth from reference
where to_ >= curdate()
limit 12) as months
union all
select * from input

segment | model | FC1        | FC2      | FC3       | FC4       | FC5      | FC6      | FC7      | FC8      | FC9      | FC10     | FC11     | FC12      
:------ | :---- | :--------- | :------- | :-------- | :-------- | :------- | :------- | :------- | :------- | :------- | :------- | :------- | :---------
        |       | April 2022 | May 2022 | June 2022 | July 2022 | Aug 2022 | Sep 2022 | Oct 2022 | Nov 2022 | Dec 2022 | Jan 2023 | Feb 2023 | March 2023
HRX     | P3412 | 9          | 14       | 11        | 22        | 17       | 23       | 18       | 15       | 23       | 12       | 12       | 19        
SRX     | O321  | 11         | 8        | 8         | 9         | 9        | 16       | 19       | 7        | 22       | 12       | 11       | 15        
SRX     | LD12  | 14         | 10       | 20        | 22        | 18       | 19       | 10       | 17       | 21       | 16       | 10       | 21        
HRX     | M421  | 17         | 18       | 16        | 12        | 14       | 17       | 10       | 16       | 8        | 8        | 7        | 23        
MRX     | N342  | 3          | 23       | 16        | 13        | 20       | 9        | 16       | 14       | 16       | 17       | 10       | 11        
HRX     | J231  | 4          | 10       | 20        | 20        | 21       | 23       | 17       | 22       | 14       | 15       | 8        | 22

db<>fiddle here

MySQL 根据当前日期动态分配月份

MySQL Dynamic assignment of month based on current date

mysql

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