我正在尝试将我的T-SQL转换为LINQ语句,但却令我感到头痛。请问有人能指出我在这里做错了什么吗?
T-SQL
select
h.DateStamp
, h.Machine
, h.SalesInvoice
, h.Status
, sum(i.Quantity) totalquantity
, sum(IIF(h.[Status]='SALES', i.Quantity, 0)) as SalesQty
, sum(IIF(h.[Status]='RETURNS', i.Quantity, 0)) as ReturnQty
, sum(IIF(h.[Status]='SALES', i.Quantity*i.Soldsrp , 0)) as SalesGross
, sum(IIF(h.[Status]='RETURNS', i.Quantity*i.Soldsrp, 0)) as ReturnGross
, sum(IIF(h.[Status]='SALES', i.DiscountAmount , 0)) as SalesDiscount
, sum(IIF(h.[Status]='RETURNS', i.DiscountAmount, 0)) as ReturnDiscount
, sum(IIF(h.[Status]='SALES', i.TotalAmount , 0)) as SalesACD
, sum(IIF(h.[Status]='RETURNS', i.TotalAmount , 0)) as ReturnACD
from CSHR_SalesItems i
left join CSHR_SalesHeader h on h.SalesOrderNum = i.SalesOrderNum
where H.DateStamp between '2015-08-20 00:00:00.000' and '2015-08-27 23:59:00.000'
group by h.DateStamp, h.Machine, h.SalesInvoice, h.[Status]
这是我尝试使用Entity Framework将其转换为LINQ。GroundCommander是实体。
using (var GC = new GroundCommanderEntities())
{
foreach (var item in GC.CSHR_SalesItems)
{
var Summary =
from i in GC.CSHR_SalesItems
join h in GC.CSHR_SalesHeader on item.SalesOrderNum equals h.SalesOrderNum into IH
from h in IH
where (h.DateStamp >= dateTimePickerStart.Value && h.DateStamp <= dateTimePickerLast.Value)
select new {
h.DateStamp,
h.Machine,
h.SalesInvoice,
h.Status,
i.Quantity //need to get the sum
};
}
from h in IH.DefaultIfEmpty()
来实现左连接。 - juharrCSHR_SalesItems
中创建了一个导航属性,以便为您提供CSHR_SalesHeader
中的值列表?使用它比一开始就进行连接更容易。 - juharr