diff --git a/Src/Asp.Net/SqlServerTest/Demos/8_JoinSql.cs b/Src/Asp.Net/SqlServerTest/Demos/8_JoinSql.cs
index 7ffd25e08..fe2844252 100644
--- a/Src/Asp.Net/SqlServerTest/Demos/8_JoinSql.cs
+++ b/Src/Asp.Net/SqlServerTest/Demos/8_JoinSql.cs
@@ -20,6 +20,16 @@ namespace OrmTest.Demo
             SelectMerge();
             ConditionalModel();
             JoinExp();
+            Clone();
+        }
+
+        private static void Clone()
+        {
+            //var db = GetInstance();
+            //var qy = db.Queryable<Student>().Where(it => 1 == 1);
+
+            //var list1 =qy.Clone<Student>().Where(it => it.Id == 1).ToList();
+            //var list2 = qy.Clone<Student>().Where(it => it.Id == 2).ToList();
         }
 
         private static void JoinExp()
diff --git a/Src/Asp.Net/SqlSugar/Infrastructure/SqlSugarAccessory.cs b/Src/Asp.Net/SqlSugar/Infrastructure/SqlSugarAccessory.cs
index f945fbdc2..67252244c 100644
--- a/Src/Asp.Net/SqlSugar/Infrastructure/SqlSugarAccessory.cs
+++ b/Src/Asp.Net/SqlSugar/Infrastructure/SqlSugarAccessory.cs
@@ -247,12 +247,12 @@ namespace SqlSugar
         #endregion
 
         #region Create Instance
-        protected ISugarQueryable<T> CreateQueryable<T>() where T : class, new()
+        protected ISugarQueryable<T> CreateQueryable<T>() 
         {
             ISugarQueryable<T> result = InstanceFactory.GetQueryable<T>(this.CurrentConnectionConfig);
             return CreateQueryable(result);
         }
-        protected ISugarQueryable<T> CreateQueryable<T>(ISugarQueryable<T> result) where T : class, new()
+        protected ISugarQueryable<T> CreateQueryable<T>(ISugarQueryable<T> result) 
         {
             var sqlBuilder = InstanceFactory.GetSqlbuilder(CurrentConnectionConfig);
             result.Context = this.Context;
@@ -308,7 +308,7 @@ namespace SqlSugar
             return result;
         }
 
-        protected void CreateQueryJoin<T>(Expression joinExpression, Type[] types, ISugarQueryable<T> queryable) where T : class, new()
+        protected void CreateQueryJoin<T>(Expression joinExpression, Type[] types, ISugarQueryable<T> queryable)  
         {
             this.CreateQueryable<T>(queryable);
             string shortName = string.Empty;
@@ -321,7 +321,7 @@ namespace SqlSugar
                 queryable.SqlBuilder.QueryBuilder.Parameters.AddRange(paramters);
             }
         }
-        protected void CreateEasyQueryJoin<T>(Expression joinExpression, Type[] types, ISugarQueryable<T> queryable) where T : class, new()
+        protected void CreateEasyQueryJoin<T>(Expression joinExpression, Type[] types, ISugarQueryable<T> queryable)  
         {
             this.CreateQueryable<T>(queryable);
             string shortName = string.Empty;
diff --git a/Src/Asp.Net/SqlSugar/SqlSugarClient.cs b/Src/Asp.Net/SqlSugar/SqlSugarClient.cs
index 457efd0f0..7fd4259bc 100644
--- a/Src/Asp.Net/SqlSugar/SqlSugarClient.cs
+++ b/Src/Asp.Net/SqlSugar/SqlSugarClient.cs
@@ -104,7 +104,7 @@ namespace SqlSugar
         /// <summary>
         /// Lambda Query operation
         /// </summary>
-        public virtual ISugarQueryable<T> Queryable<T>() where T : class, new()
+        public virtual ISugarQueryable<T> Queryable<T>() 
         {
 
             InitMppingInfo<T>();
@@ -114,7 +114,7 @@ namespace SqlSugar
         /// <summary>
         /// Lambda Query operation
         /// </summary>
-        public virtual ISugarQueryable<T> Queryable<T>(string shortName) where T : class, new()
+        public virtual ISugarQueryable<T> Queryable<T>(string shortName)
         {
             var queryable = Queryable<T>();
             queryable.SqlBuilder.QueryBuilder.TableShortName = shortName;
@@ -130,7 +130,7 @@ namespace SqlSugar
             queryable.SqlBuilder.QueryBuilder.TableShortName = shortName;
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2> Queryable<T, T2>(Expression<Func<T, T2, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2> Queryable<T, T2>(Expression<Func<T, T2, object[]>> joinExpression) 
         {
             InitMppingInfo<T, T2>();
             var types = new Type[] { typeof(T2) };
@@ -138,7 +138,7 @@ namespace SqlSugar
             this.CreateQueryJoin(joinExpression, types, queryable);
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2, T3> Queryable<T, T2, T3>(Expression<Func<T, T2, T3, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3> Queryable<T, T2, T3>(Expression<Func<T, T2, T3, object[]>> joinExpression) 
         {
             InitMppingInfo<T, T2, T3>();
             var types = new Type[] { typeof(T2), typeof(T3) };
@@ -146,7 +146,7 @@ namespace SqlSugar
             this.CreateQueryJoin(joinExpression, types, queryable);
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2, T3, T4> Queryable<T, T2, T3, T4>(Expression<Func<T, T2, T3, T4, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3, T4> Queryable<T, T2, T3, T4>(Expression<Func<T, T2, T3, T4, object[]>> joinExpression) 
         {
             InitMppingInfo<T, T2, T3, T4>();
             var types = new Type[] { typeof(T2), typeof(T3), typeof(T4) };
@@ -154,7 +154,7 @@ namespace SqlSugar
             this.CreateQueryJoin(joinExpression, types, queryable);
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2, T3, T4, T5> Queryable<T, T2, T3, T4, T5>(Expression<Func<T, T2, T3, T4, T5, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3, T4, T5> Queryable<T, T2, T3, T4, T5>(Expression<Func<T, T2, T3, T4, T5, object[]>> joinExpression) 
         {
             InitMppingInfo<T, T2, T3, T4, T5>();
             var types = new Type[] { typeof(T2), typeof(T3), typeof(T4), typeof(T5) };
@@ -162,7 +162,7 @@ namespace SqlSugar
             this.CreateQueryJoin(joinExpression, types, queryable);
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6> Queryable<T, T2, T3, T4, T5, T6>(Expression<Func<T, T2, T3, T4, T5, T6, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6> Queryable<T, T2, T3, T4, T5, T6>(Expression<Func<T, T2, T3, T4, T5, T6, object[]>> joinExpression) 
         {
             InitMppingInfo<T, T2, T3, T4, T5, T6>();
             var types = new Type[] { typeof(T2), typeof(T3), typeof(T4), typeof(T5), typeof(T6) };
@@ -170,7 +170,7 @@ namespace SqlSugar
             this.CreateQueryJoin(joinExpression, types, queryable);
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7> Queryable<T, T2, T3, T4, T5, T6, T7>(Expression<Func<T, T2, T3, T4, T5, T6, T7, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7> Queryable<T, T2, T3, T4, T5, T6, T7>(Expression<Func<T, T2, T3, T4, T5, T6, T7, object[]>> joinExpression) 
         {
             InitMppingInfo<T, T2, T3, T4, T5, T6, T7>();
             var types = new Type[] { typeof(T2), typeof(T3), typeof(T4), typeof(T5), typeof(T6), typeof(T7) };
@@ -178,7 +178,7 @@ namespace SqlSugar
             this.CreateQueryJoin(joinExpression, types, queryable);
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> Queryable<T, T2, T3, T4, T5, T6, T7, T8>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> Queryable<T, T2, T3, T4, T5, T6, T7, T8>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, object[]>> joinExpression) 
         {
             InitMppingInfo<T, T2, T3, T4, T5, T6, T7, T8>();
             var types = new Type[] { typeof(T2), typeof(T3), typeof(T4), typeof(T5), typeof(T6), typeof(T7), typeof(T8) };
@@ -187,7 +187,7 @@ namespace SqlSugar
             return queryable;
         }
         #region  9-12
-        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> Queryable<T, T2, T3, T4, T5, T6, T7, T8, T9>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> Queryable<T, T2, T3, T4, T5, T6, T7, T8, T9>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, object[]>> joinExpression)
         {
             InitMppingInfo<T, T2, T3, T4, T5, T6, T7, T8, T9>();
             var types = new Type[] { typeof(T2), typeof(T3), typeof(T4), typeof(T5), typeof(T6), typeof(T7), typeof(T8), typeof(T9) };
@@ -195,7 +195,7 @@ namespace SqlSugar
             this.CreateQueryJoin(joinExpression, types, queryable);
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> Queryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> Queryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, object[]>> joinExpression)
         {
             InitMppingInfo<T, T2, T3, T4, T5, T6, T7, T8, T9, T10>();
             var types = new Type[] { typeof(T2), typeof(T3), typeof(T4), typeof(T5), typeof(T6), typeof(T7), typeof(T8), typeof(T9), typeof(T10) };
@@ -203,7 +203,7 @@ namespace SqlSugar
             this.CreateQueryJoin(joinExpression, types, queryable);
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Queryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Queryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, object[]>> joinExpression) 
         {
             InitMppingInfo<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>();
             var types = new Type[] { typeof(T2), typeof(T3), typeof(T4), typeof(T5), typeof(T6), typeof(T7), typeof(T8), typeof(T9), typeof(T10), typeof(T11) };
@@ -211,7 +211,7 @@ namespace SqlSugar
             this.CreateQueryJoin(joinExpression, types, queryable);
             return queryable;
         }
-        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Queryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, object[]>> joinExpression) where T : class, new()
+        public virtual ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Queryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, object[]>> joinExpression) 
         {
             InitMppingInfo<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>();
             var types = new Type[] { typeof(T2), typeof(T3), typeof(T4), typeof(T5), typeof(T6), typeof(T7), typeof(T8), typeof(T9), typeof(T10), typeof(T11), typeof(T12) };