https://tracholar.github.io/machine-learning/2018/01/26/auc.html
select
(ry - 0.5*n1*(n1+1))/n0/n1 as auc
from(
select
sum(if(y=0, 1, 0)) as n0, --50
sum(if(y=1, 1, 0)) as n1,--100
sum(if(y=1, r, 0)) as ry --100
from(
select y, row_number() over(order by score asc) as r
from(
select y, score
from some.table
)A
)B
)C