всё ещё присутствуют недоработки

GasStation/Forms/FormSellings.cs

@@ -35,7 +35,7 @@ namespace GasStation.Forms
         {
             dataGridViewData.DataSource = _sellingRepository.ReadSelling();
             dataGridViewData.Columns["ID"].Visible = false;
-            dataGridViewData.Columns["SupplyDate"].DefaultCellStyle.Format = "dd MMMM yyyy hh:mm";
+            dataGridViewData.Columns["SellingDateTime"].DefaultCellStyle.Format = "dd MMMM yyyy";
         }
 
         private void FormSellings_Load(object sender, EventArgs e)

GasStation/Repositories/Implementations/SellingRepository.cs

@@ -58,7 +58,7 @@ VALUES (@Id, @ProductID, @Count)";
             var builder = new QueryBuilder();
             if (dateTime.HasValue)
             {
-                builder.AddCondition("s.SellingDateTime = @sellingDateTime");
+                builder.AddCondition("s.SellingDateTime = @dateTime");
             }
             if (count.HasValue)
             {
@@ -70,17 +70,17 @@ VALUES (@Id, @ProductID, @Count)";
             }
 
             using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
-            var querySelect = @"
+            var querySelect = @$"
 SELECT
-    fr.*,
+    s.*,
     CONCAT(p.ProductType, ' ', p.ProductName) as ProductName,
-    ps.ProdutId,
+    ps.ProductId,
     ps.Count,
-    g.GasmanName as 'GasmanName'
+    g.GasmanName
 FROM Selling s
-LEFT JOIN Gasman g on g.Id = s.GasmanId
-INNER JOIN Product_Selling ps ON ps.ProductId = s.Id
-LEFT JOIN Product p on p.Id = s.ProductId
+LEFT JOIN Gasman g on g.ID = s.GasmanID
+INNER JOIN Product_Selling ps ON ps.ID = s.ID
+LEFT JOIN Product p on p.Id = ps.ProductID
 {builder.Build()}";
             var sellingDict = new Dictionary<int, List<ProductSelling>>();
             var selling = connection.Query<Selling, ProductSelling, Selling>(querySelect, (sell, sellings) =>
@@ -92,16 +92,16 @@ LEFT JOIN Product p on p.Id = s.ProductId
                 }
                 ps.Add(sellings);
                 return sell;
-            }, splitOn: "ProdutcId", param: new
+            }, splitOn: "ProductId", param: new
             {dateTime, count, gasmanID});
             _logger.LogDebug("Полученные объекты: {json}",
             JsonConvert.SerializeObject(selling));
 
             return sellingDict.Select(x =>
             {
-                var fr = selling.First(y => y.Id == x.Key);
-                fr.SetProductSelling(x.Value);
-                return fr;
+                var s = selling.First(y => y.Id == x.Key);
+                s.SetProductSelling(x.Value);
+                return s;
             }).ToArray();
 
         }

GasStation/Repositories/Implementations/SupplyRepository.cs

@@ -83,7 +83,7 @@ WHERE id=@Id";
             }
 
             using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
-            var querySelect = @"SELECT 
+            var querySelect = @$"SELECT 
     s.*,
     CONCAT(p.ProductType, ' ', p.ProductName) as ProductName,
     sup.SupplierName as SupplierName