diff --git a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
index e7d3454c9..70e6fdc68 100644
--- a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
+++ b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
@@ -95,6 +95,7 @@
     <Compile Include="Models\OrderItem.cs" />
     <Compile Include="Demo\Demo0_SqlSugarClient.cs" />
     <Compile Include="Models\ViewOrder.cs" />
+    <Compile Include="UnitTest\UCustom019.cs" />
     <Compile Include="UnitTest\UintDynamic.cs" />
     <Compile Include="UnitTest\UnitManyToMany.cs" />
     <Compile Include="UnitTest\UCustom018.cs" />
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs b/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs
index 783bf24f0..8210451b9 100644
--- a/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/Main.cs
@@ -31,6 +31,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UCustom019.Init();
             UnitManyToMany.Init();
             UCustom018.Init();
             UCustom017.Init();
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/UCustom019.cs b/Src/Asp.Net/SqlServerTest/UnitTest/UCustom019.cs
new file mode 100644
index 000000000..fc96fd06b
--- /dev/null
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/UCustom019.cs
@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SqlSugar;
+namespace OrmTest 
+{
+    internal class UCustom019
+    {
+        public static void Init()
+        {
+            var db = NewUnitTest.Db;
+
+            //建表 
+            if (!db.DbMaintenance.IsAnyTable("Test001", false))
+            {
+                db.CodeFirst.InitTables<Test001>();
+                //用例代码 
+                var dataList = new List<Test001>();
+                dataList.Add(new Test001() { id = 1, group = 1, addTime = DateTime.Now });
+                dataList.Add(new Test001() { id = 2, group = 1, addTime = DateTime.Now.AddDays(1) });
+                dataList.Add(new Test001() { id = 3, group = 2, addTime = DateTime.Now.AddDays(1) });
+                dataList.Add(new Test001() { id = 4, group = 2, addTime = DateTime.Now.AddDays(1) });
+                dataList.Add(new Test001() { id = 5, group = 2, addTime = DateTime.Now.AddDays(1) });
+                dataList.Add(new Test001() { id = 6, group = 3, addTime = DateTime.Now.AddDays(1) });
+                var result = db.Insertable(dataList).ExecuteCommand();//用例代码
+            }
+
+            var defaultTime = new DateTime(1900, 1, 1);
+            var nowTime = DateTime.Now;
+
+            var iQueryAble = db.Queryable<Test001>()
+                .GroupBy(it => it.group)
+                .GroupBy(it => it.addTime)
+                .Where(it=>it.id==1)
+                .Select<Test001_Ext>(it => new Test001_Ext
+                {
+                    group = it.group,
+                    addTime = it.addTime,
+                    lastTime = SqlFunc.AggregateMax(SqlFunc.IIF(it.group == 1, it.addTime, defaultTime)),
+                    lastTime2 = SqlFunc.AggregateMax(SqlFunc.IIF(it.group == 1, it.addTime, defaultTime))
+                });
+            var res = db.Queryable(iQueryAble)
+                           
+                            .InnerJoin<Test001>((i, t) => i.group == t.group)
+                            .Where((i,t)=>t.addTime < nowTime.AddDays(1))
+                            .ToList();
+
+            Console.WriteLine("用例跑完");
+            Console.ReadKey();
+        }
+        //建类
+        public class Test001
+        {
+            public int id { get; set; }
+
+            public int group { get; set; }
+
+            public DateTime addTime { get; set; }
+        }
+
+        public class Test001_Ext : Test001
+        {
+            public DateTime lastTime { get; set; }
+            public DateTime lastTime2 { get;   set; }
+        }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/SqlSugarClient.cs b/Src/Asp.Net/SqlSugar/SqlSugarClient.cs
index b81fd5cc6..767aee07a 100644
--- a/Src/Asp.Net/SqlSugar/SqlSugarClient.cs
+++ b/Src/Asp.Net/SqlSugar/SqlSugarClient.cs
@@ -347,9 +347,9 @@ namespace SqlSugar
             var result= this.Context.Queryable<T>(queryable);
             var QueryBuilder = queryable.QueryBuilder;
             result.QueryBuilder.IsQueryInQuery = true;
-            result.QueryBuilder.WhereIndex = QueryBuilder.WhereIndex++;
-            result.QueryBuilder.LambdaExpressions.ParameterIndex = QueryBuilder.LambdaExpressions.ParameterIndex++;
-            result.QueryBuilder.LambdaExpressions.Index = QueryBuilder.LambdaExpressions.Index++;
+            var appendIndex = result.QueryBuilder.Parameters==null?1:result.QueryBuilder.Parameters.Count+1;
+            result.QueryBuilder.WhereIndex = (QueryBuilder.WhereIndex+1);
+            result.QueryBuilder.LambdaExpressions.ParameterIndex = (QueryBuilder.LambdaExpressions.ParameterIndex+ appendIndex);
             return result;
         }