Update Oracle Core Demo

Src/Asp.NetCore2/SqlSeverTest/OracleTest/Models/ViewModelStudent.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrmTest.Models
+{
+    public class ViewModelStudent:Student
+    {
+
+    }
+    public class ViewModelStudent2
+    {
+        public string Name { get; set; }
+        public Student Student { get; set; }
+    }
+    public class ViewModelStudent3: Student
+    {
+         public string SchoolName { get; set; }
+    }
+}