Add unit test

Src/Asp.Net/SqlServerTest/SqlServerTest.csproj

@@ -97,6 +97,7 @@
     <Compile Include="Models\OrderItem.cs" />
     <Compile Include="Demo\Demo0_SqlSugarClient.cs" />
     <Compile Include="Models\ViewOrder.cs" />
+    <Compile Include="UnitTest\UnitSub.cs" />
     <Compile Include="UnitTest\UnitUpdateNavN3.cs" />
     <Compile Include="UnitTest\UnitOneToOne12.cs" />
     <Compile Include="UnitTest\Models\poetry_video_comment.cs" />

Src/Asp.Net/SqlServerTest/UnitTest/Main.cs

@@ -31,6 +31,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UnitSub.Init();
             UnitUpdateNavN3.Init();
             UnitOneToOne12.Init();
             UnitInsertNav3.Init();

Src/Asp.Net/SqlServerTest/UnitTest/UnitSub.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SqlSugar;
+namespace OrmTest 
+{
+    public  class UnitSub
+    {
+        public static void Init() 
+        {
+            var db = NewUnitTest.Db;
+            var sql=db.Queryable<Order>()
+                .Select(it => new
+                {
+                     id= SqlFunc.Subqueryable<SubEntity>().Sum(o => o.Id)
+                }).ToSql();
+            if (!sql.Key.Contains("id_1")) 
+            {
+                throw new Exception("unit error");
+            }
+        }
+        public class SubEntity 
+        {
+            [SqlSugar.SugarColumn(ColumnName ="id_1")]
+            public decimal Id { get; set; }    
+        }
+    }
+}