Computing weekly percent on grouped by table - sql

Question

Good morning everybody.
I work on the last version of SQL Workbench.
I got a table group by Year and Week, and a type of document verification (3 at total).
Year
Week
Verif_Type
Total
2020
1
1
3
2020
1
3
1
2020
2
1
1
2020
2
2
6
2020
2
3
3
I want to know how many percent of each verification type are performed by week and year.
My question is there : How can I print the percent column next such that
Year
Week
Verif_Type
Total
Percent
2020
1
1
3
75
2020
1
3
1
25
2020
2
1
1
10
2020
2
2
6
60
2020
2
3
3
30
I have already computed total count per week but the table have different sizes, so I can't use operations with it.
Thank you for your help :)

Answer 1

For MySql version 8.0 use Query#1 using windows function and for older version of MySQL use Query#2 (using subquery).
Schema and insert statements:
create table yourtable(Year int, Week int, Verif_Type int, Total int);
insert into yourtable values(2020, 1, 1, 3);
insert into yourtable values(2020, 1, 3, 1);
insert into yourtable values(2020, 2, 1, 1);
insert into yourtable values(2020, 2, 2, 6);
insert into yourtable values(2020, 2, 3, 3);
Query#1 (using window function)
Select year, week, verif_type, total, (total*100/sum(total)over(partition by year, week)) percent
From yourtable
Output:
year
week
verif_type
total
percent
2020
1
1
3
75.0000
2020
1
3
1
25.0000
2020
2
1
1
10.0000
2020
2
2
6
60.0000
2020
2
3
3
30.0000
Query#2 (using subquery)
select year, week, verif_type, total, (total*100/(select sum(total) from yourtable b where a.year=b.year and a.Week=b.Week)) percent
From yourtable a
Output:
year
week
verif_type
total
percent
2020
1
1
3
75.0000
2020
1
3
1
25.0000
2020
2
1
1
10.0000
2020
2
2
6
60.0000
2020
2
3
3
30.0000
db<fiddle here