我有一张订单表。状态在与订单相连的土壤订单上。我只想退回加入的土壤订单不具有“已移除”状态的订单。
我曾以为
join sso in db.SoilSamplingOrders on ord.order_id equals sso.order_id
where sso.status.Equals("Removed")!=true
但随后没有记录返回！
感谢您的帮助（以下查询）
var query =
from ord in db.Orders
join sso in db.SoilSamplingOrders on ord.order_id equals sso.order_id
where sso.status.Equals("Removed")!=true
join cust in db.Customers on ord.customer_id equals cust.customer_id
select new Listing
{
assigned_to = sso.assigned_to,
company = cust.company,
order_id = ord.order_id,
order_created = ord.order_created,
customer_id = ord.customer_id,
order_created_by_employ_id = ord.order_created_by_employ_id,
first_farm_on_order = (from f in db.SoilSamplingSubJobs
where f.order_id == ord.order_id
select new ListingSubJob { first_farm_on_order = f.farm }).
AsEnumerable().First().first_farm_on_order,
total_fields = (from f in db.SoilSamplingSubJobs
where f.order_id == ord.order_id
select new { f.sssj_id }).AsEnumerable().Count(),
total_area = (float?) (from f in db.SoilSamplingSubJobs
where f.order_id == ord.order_id && f.area_ha != null
select f.area_ha ).Sum() ?? 0 ,
total_area_ph_density = (float?)(from f in db.SoilSamplingSubJobs
where f.order_id == ord.order_id && f.ph != null
select f.ph).Sum() ?? 0,
};