Изменить на linq left join query

Question

SELECT I.*, SI.SupplierID FROM item I 
LEFT JOIN SupplierItem SI ON I.ItemID = SI.ItemID AND I.Price = SI.Price 
WHERE I.CurrentQty <= I.ReorderLevel and SI.SupplierID = 'AlPA' 

Как я могу изменить этот запрос sql на Linq Query.

Answer 1

Ниже запрос будет конвертировать Sql запрос Linq запрос

var data = 
    from row in db.item 
    join row1 in db.SupplierItem 
     on new { ID= row.ItemID , Price = row.Price } 
     equals new { ID= row1.ItemID , Price = row1.Price } into joinedData 
    from row2 in joinedData.DefaultIfEmpty() 
    where row.CurrentQty <= row.ReorderLevel && row2.SupplierID == "AlPA" 
    select new { 
     item = row, 
     SupplierID = row2.SupplierID 
    };