Update Oracle Core Demo

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

@@ -0,0 +1,17 @@
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrmTest.Models
+{
+    public class School
+    {
+        [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+        public int Id { get; set; }
+        public string Name { get; set; }
+    }
+}