Подкоректировал запрос

ITServiceManager/ITServiceManager/Entities/Service.cs

@@ -10,8 +10,10 @@ public class Service
     [DisplayName("Тип услуги")]
     public ServiceType ServiceType { get; private set; }
 
-    [DisplayName("Описание")]
+    [DisplayName("Название услуги")]
     public string ServiceName { get; private set; } = string.Empty;
+
+    [DisplayName("Описание")]
     public string Description { get; private set; } = string.Empty;
 
     public static Service CreateEntity(int id, ServiceType type, string name, string description)

ITServiceManager/ITServiceManager/Repositories/Implementations/OrderRepository.cs

@@ -36,7 +36,7 @@ public class OrderRepository : IOrderRepository
             }
             using var connection = new NpgsqlConnection(_connectionString.ConnectionString);      
             var querySelect = @$"
-                SELECT o.*, c.Name as CompanyName, os.serviceId, os.quantity, s.ServiceType as ServiceName
+                SELECT o.*, c.Name as CompanyName, os.serviceId, os.quantity, s.ServiceName as ServiceName
                 FROM Orders AS o
                 LEFT JOIN Companies c on c.Id = o.CompanyId
                 INNER JOIN Order_Service AS os ON o.id = os.orderId