如何将 SQL 查询转换为 Linq

Question

How can we convert SQL query below to linq (C#)?

SELECT o.Week,
        (select sum(Positive-Negative)
        FROM tbl i
        where i.Week <= o.Week
        )   
    FROM tbl o

I have tried but i am not sure how to sum up these values

var result = from i in weeklySatisfaction
from o in weeklySatisfaction
where i.Week <= o.Week
select new
{
   Week = o.Week,
   Net = i.Positive - i.Negative
};

Answer 1

This linq code will work

    var values = weeklySatisfaction.Select(o => new 
   { 
     Week = o.Week, 
     Net = weeklySatisfaction
                 .Where(i => i.Week < o.Week)
                 .Select(x => x.Positive - x.Negative).Sum() 
   });

Enjoy !