Изчисляване Текущи суми по редове и групиране по ID

Братко, опитай това... Тествано е на MSSQL...

select ID, name, marks, 
    marks + isnull(SUM(marks) OVER (  PARTITION BY ID   ORDER BY  ID  ROWS BETWEEN UNBOUNDED PRECEDING  AND  1  PRECEDING) ,0) as Running_total
from students