If MySQL calculates the current month change / current month increase / year-on-year change / year-on-year increase?

Problem description ：

The original data

The first column is id, The second column is the date （ It's the last day of every month ）, The third column is the sales of one month .
For example, the first line means id by 1001,2022 year 7 The monthly sales volume is 500.

id	date	sales
1001	20220731	500
1001	20210731	600
1001	20220630	800
1002	20220731	400
1002	20210731	300
1002	20220630	100
1003	20220731	600
1003	20210731	400
1003	20220630	600
1004	20220731	800
1004	20210731	100
1004	20220630	300

final result

id	this_month	this_month_sales	last_month_sales	last_year_sales	Growth rate of this month	Changes in this month	Year-on-year growth	Year on year changes
1001	Jul-22	500	800	600	0.60%	300	-0.17%	-100
1002	Jul-22	400	100	300	-0.75%	-300	0.33%	100
1003	Jul-22	600	600	400	0.00%	0	0.50%	200
1004	Jul-22	800	300	100	-0.63%	-500	7.00%	700

Their thinking ：

Create three temporary tables , The table names are tem_this_month、tem_next_month、tem_next_year.
Three tables columns Respectively ：

Table name	columns
tem_this_month:	id, date, this_month, next_month, next_year,sales
tem_next_month:	id, next_month, sales
tem_next_year:	id, next_year, sales

then left join Three tables

Specific process and code

1. Create three temporary tables

1.1 The first provisional table tem_this_month

create temporary table tem_this_month as (select id,
                                                 date,
                                                 date_format(date, '%Y-%m')                             as this_month,
                                                 date_format(date_sub(date, interval -1 month), '%Y-%m') as next_month,
                                                 date_format(date_sub(date, interval -1 year), '%Y-%m')  as next_year,
                                                 sales
                                          from mysql_xox
);
select *
from tem_this_month;

tem_this_month

1.2 Second provisional table tem_next_month

create temporary table tem_next_month as (select id,
                                                 date_format(date_sub(date, interval -1 month), '%Y-%m') as next_month,
                                                 sales
                                          from mysql_xox
);
select *
from tem_next_month;

tem_next_month

1.3 The third provisional table tem_next_year

create temporary table tem_next_year as (select id,
                                                    date_format(date_sub(date, interval -1 year), '%Y-%m') as 'next_year',
                                                    sales
                                             from mysql_xox
);
select *
from tem_next_year;

tem_next_year

2. left join Three tables and calculate

select a.id,
       a.this_month,
       date_format(date_sub(a.date, interval 1 month), '%Y-%m') as last_month,
        date_format(date_sub(a.date, interval 1 year), '%Y-%m')  as last_year,
       a.sales                                                                                 as this_month_sales,
       b.sales                                                                                 as last_month_sales,
       c.sales                                                                                 AS last_year_sales,
       case
           when a.sales is not null and b.sales is not null
               then concat(round((b.sales - a.sales) / a.sales,2),'%') end                                      as  Growth rate of this month ,
       case
           when a.sales is not null and b.sales is not null
               then b.sales - a.sales end                                                    as  Changes in this month ,
       case
           when this_month is not null and c.sales is not null
               then concat(round((a.sales - c.sales) / c.sales,2),'%') end                                      as  Year-on-year growth ,
       case when this_month is not null and c.sales is not null then a.sales - c.sales end as  Year on year changes 

from tem_this_month a
         left join tem_next_month b on a.id = b.id and a.this_month = b.next_month
         left join tem_next_year c on a.id = c.id and a.this_month = c.next_year;

Lite version ：

select a.id,
       a.this_month,
       a.sales                                                                                 as this_month_sales,
       b.sales                                                                                 as last_month_sales,
       c.sales                                                                                 AS last_year_sales,
       case
           when a.sales is not null and b.sales is not null
               then concat(round((b.sales - a.sales) / a.sales,2),'%') end                                      as  Growth rate of this month ,
       case
           when a.sales is not null and b.sales is not null
               then b.sales - a.sales end                                                    as  Changes in this month ,
       case
           when this_month is not null and c.sales is not null
               then concat(round((a.sales - c.sales) / c.sales,2),'%') end                                      as  Year-on-year growth ,
       case when this_month is not null and c.sales is not null then a.sales - c.sales end as  Year on year changes 

from tem_this_month a
         left join tem_next_month b on a.id = b.id and a.this_month = b.next_month
         left join tem_next_year c on a.id = c.id and a.this_month = c.next_year
where b.sales is not null and c.sales is not null;