This is what I have:
create table Test(day int, status varchar(50), transactions int);
insert into Test(day, status, transactions) values(5, "success", 105);
insert into Test(day, status, transactions) values(5, "success", 105);
insert into Test(day, status, transactions) values(5, "failure", 40);
insert into Test(day, status, transactions) values(6, "success", 40);
insert into Test(day, status, transactions) values(6, "failure", 32);
insert into Test(day, status, transactions) values(7, "success", 552);
insert into Test(day, status, transactions) values(7, "failure", 4);
select day, status, sum(transactions) from Test
group by day, status
getting this one:
day status sum(transactions)
5 success 210
5 failure 40
6 success 40
6 failure 32
7 success 552
7 failure 4
I want to have additional column, telling me per day how much is my success rate. Eg 210/(210+40)
for day 5, 40/(32+40) for day 6 etc:
day status sum(transactions) rate
5 success 210 0.8400
5 failure 40 0.1600
6 success 40 0.5556
6 failure 32 0.4444
7 success 552 0.9928
7 failure 4 0.0072
This way you can get the rates (success/failure) for equivalent status type.
select t.day, t.status, sum(transactions), sum(transactions)/total as rate
from Test t inner join (select day, sum(transactions) as total from Test group by day) total
on t.day = total.day
group by t.day, t.status
Output:
day status sum(transactions) rate
5 failure 40 0.2759
5 success 105 0.7241
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