如何将此 sql 查询转换为 linq 查询。 我被困在 group by 和 sum 部分

Question

我的 SQL 查询看起来像这样： SQL 查询返回与存在的每个 colorwaysid 关联的收入

select p.colorwaysid,sum(oivs.actItemvalue+oivs.custom) as revenue 
from Product p inner join eshakti_corp..orderitemvaluesplit oivs on p.productid = oivs.productid
inner join eshakti_corp..orders o on oivs.orderid = o.orderid
where colorwaysid is not null and o.crdate >= '4/1/2022' and o.crdate <= '4/30/2022'
group by p.colorwaysid order by revenue desc

到目前为止，我已经在 LINQ C# 中完成了此操作

from product in eshaktiDb.Products 
join oivs in corpDb.OrderitemvalueSplits on product.ProductId equals oivs.Productid
join order in corpDb.Orders on oivs.Orderid equals order.OrderID
where product.ColorWaysId != null && order.CrDate >= fromDate && order.CrDate <= toDate

请帮助我创建完整的 Linq 查询。 谢谢！

Answer 1

group by很明显：

var query = 
    from product in eshaktiDb.Products 
    join oivs in corpDb.OrderitemvalueSplits on product.ProductId equals oivs.Productid
    join order in corpDb.Orders on oivs.Orderid equals order.OrderID
    where product.ColorWaysId != null && order.CrDate >= fromDate && order.CrDate <= toDate
    group ovis by p.colorwaysid into g
    select new
    {
        colorwaysid = g.Key,
        revenue = g.Sum(o => o.actItemvalue + o.custom)
    };

请注意，如果您已正确配置导航属性，则可以省略连接。