diff --git a/FreeSql.DbContext/FreeSql.DbContext.xml b/FreeSql.DbContext/FreeSql.DbContext.xml
index e4208f1f..b3c14870 100644
--- a/FreeSql.DbContext/FreeSql.DbContext.xml
+++ b/FreeSql.DbContext/FreeSql.DbContext.xml
@@ -502,14 +502,5 @@
             <param name="that"></param>
             <returns></returns>
         </member>
-        <member name="M:Microsoft.Extensions.DependencyInjection.FreeSqlRepositoryDependencyInjection.AddFreeRepository(Microsoft.Extensions.DependencyInjection.IServiceCollection,System.Action{FreeSql.FluentDataFilter},System.Reflection.Assembly[])">
-            <summary>
-            批量注入 Repository，可以参考代码自行调整
-            </summary>
-            <param name="services"></param>
-            <param name="globalDataFilter"></param>
-            <param name="assemblies"></param>
-            <returns></returns>
-        </member>
     </members>
 </doc>
diff --git a/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLExpression/MathTest.cs b/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLExpression/MathTest.cs
index edc58bd3..ef526b93 100644
--- a/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLExpression/MathTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLExpression/MathTest.cs
@@ -78,79 +78,79 @@ namespace FreeSql.Tests.PostgreSQLExpression
         public void Exp()
         {
             var data = new List<object>();
-            data.Add(select.Where(a => Math.Exp(1) == a.Clicks + 1).ToList());
+            data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Exp(1) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Log()
         {
             var data = new List<object>();
-            //data.Add(select.Where(a => Math.Log(a.Clicks + 0.5) == a.Clicks + 1).ToList());
+            //data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Log(a.Clicks + 0.5) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Log10()
         {
             var data = new List<object>();
-            //data.Add(select.Where(a => Math.Log10(a.Clicks + 0.5) == a.Clicks + 1).ToList());
+            //data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Log10(a.Clicks + 0.5) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Pow()
         {
             var data = new List<object>();
-            data.Add(select.Where(a => Math.Pow(2, a.Clicks) == a.Clicks + 1).ToList());
+            data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Pow(2, a.Clicks) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Sqrt()
         {
             var data = new List<object>();
-            data.Add(select.Where(a => Math.Sqrt(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+            data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Sqrt(Math.Pow(2, a.Clicks)) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Cos()
         {
             var data = new List<object>();
-            data.Add(select.Where(a => Math.Cos(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+            data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Cos(Math.Pow(2, a.Clicks)) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Sin()
         {
             var data = new List<object>();
-            data.Add(select.Where(a => Math.Sin(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+            data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Sin(Math.Pow(2, a.Clicks)) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Tan()
         {
             var data = new List<object>();
-            data.Add(select.Where(a => Math.Tan(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+            data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Tan(Math.Pow(2, a.Clicks)) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Acos()
         {
             var data = new List<object>();
-            //data.Add(select.Where(a => Math.Acos(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+            //data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Acos(Math.Pow(2, a.Clicks)) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Asin()
         {
             var data = new List<object>();
-            //data.Add(select.Where(a => Math.Asin(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+            //data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Asin(Math.Pow(2, a.Clicks)) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Atan()
         {
             var data = new List<object>();
-            data.Add(select.Where(a => Math.Atan(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+            data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Atan(Math.Pow(2, a.Clicks)) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Atan2()
         {
             var data = new List<object>();
-            data.Add(select.Where(a => Math.Atan2(2, a.Clicks) == a.Clicks + 1).ToList());
+            data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Atan2(2, a.Clicks) == a.Clicks + 1).Limit(10).ToList());
         }
         [Fact]
         public void Truncate()
         {
             var data = new List<object>();
-            data.Add(select.Where(a => Math.Truncate(a.Clicks * 1.0 / 3) == a.Clicks + 1).ToList());
+            data.Add(select.Where(a => a.Clicks < 100).Where(a => Math.Truncate(a.Clicks * 1.0 / 3) == a.Clicks + 1).Limit(10).ToList());
         }
     }
 }
diff --git a/FreeSql.Tests/FreeSql.Tests/Sqlite/SqliteCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests/Sqlite/SqliteCodeFirstTest.cs
index ab378295..b2a0785f 100644
--- a/FreeSql.Tests/FreeSql.Tests/Sqlite/SqliteCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/Sqlite/SqliteCodeFirstTest.cs
@@ -314,6 +314,17 @@ namespace FreeSql.Tests.Sqlite
             var itemstb = select.ToDataTable();
         }
 
+        [Fact]
+        public void UpdateSetFlag()
+        {
+            var sql1 = g.sqlite.Update<TableAllType>()
+                .Set(a => a.Enum2 | TableAllTypeEnumType2.f2)
+                .Where(a => a.Id == 10)
+                .ToSql();
+            Assert.Equal(@"UPDATE ""tb_alltype"" SET ""Enum2"" = (""Enum2"" | 1), ""DateTime"" = datetime(current_timestamp,'localtime'), ""DateTimeOffSet"" = datetime(current_timestamp,'localtime'), ""DateTimeNullable"" = datetime(current_timestamp,'localtime'), ""DateTimeOffSetNullable"" = datetime(current_timestamp,'localtime') 
+WHERE (""Id"" = 10)", sql1);
+        }
+
         [Table(Name = "tb_alltype")]
         class TableAllType
         {
diff --git a/FreeSql.Tests/FreeSql.Tests/UnitTest4.cs b/FreeSql.Tests/FreeSql.Tests/UnitTest4.cs
index 3768615a..608fb115 100644
--- a/FreeSql.Tests/FreeSql.Tests/UnitTest4.cs
+++ b/FreeSql.Tests/FreeSql.Tests/UnitTest4.cs
@@ -13,6 +13,88 @@ namespace FreeSql.Tests
 {
     public class UnitTest4
     {
+        [Fact]
+        public void SelectN_SubSelectN()
+        {
+            var fsql = g.sqlite;
+            var plansql1 = fsql.Select<ts_tplan, ts_tproductmode, ts_tflowversion, ts_tproflow>()
+                .LeftJoin((a, b, c, d) => a.pmcode == b.pmcode)
+                .LeftJoin((a, b, c, d) => b.pmcode == c.pmcode && c.isdefault == 1)
+                .InnerJoin((a, b, c, d) => c.fvcode == d.fvcode)
+                .ToSql((a, b, c, d) => new
+                {
+                    a.billcode,
+                    b.pmname,
+                    d.techcode
+                });
+
+            var plansql2 = fsql.Select<ts_tplan, ts_tproductmode, ts_tflowversion, ts_tproflow>()
+                .LeftJoin((a, b, c, d) => a.pmcode == b.pmcode)
+                .LeftJoin((a, b, c, d) => b.pmcode == c.pmcode && c.isdefault == 1)
+                .InnerJoin((a, b, c, d) => c.fvcode == d.fvcode)
+                .ToSql((a, b, c, d) => new
+                {
+                    a.billcode,
+                    b.pmname,
+                    d.techcode,
+                    planQty = fsql.Select<ts_tproduct_catering, ts_tproduct_catering_detail>()
+                        .InnerJoin((e, f) => e.code == f.pccode)
+                        .Where((e, f) => a.code == e.plancode)
+                        .Count()
+                });
+            Assert.Equal(@"SELECT a.""billcode"" as1, b.""pmname"" as2, d.""techcode"" as3, (SELECT count(1) 
+    FROM ""ts_tproduct_catering"" e 
+    INNER JOIN ""ts_tproduct_catering_detail"" f ON e.""code"" = f.""pccode"" 
+    WHERE (a.""code"" = e.""plancode"")) as4 
+FROM ""ts_tplan"" a 
+LEFT JOIN ""ts_tproductmode"" b ON a.""pmcode"" = b.""pmcode"" 
+LEFT JOIN ""ts_tflowversion"" c ON b.""pmcode"" = c.""pmcode"" AND c.""isdefault"" = 1 
+INNER JOIN ""ts_tproflow"" d ON c.""fvcode"" = d.""fvcode""", plansql2);
+        }
+        class ts_tplan
+        {
+            public string code { get; set; }
+            public string pmcode { get; set; }
+            public string billcode { get; set; }
+        }
+        class ts_tproductmode
+        {
+            public string pmcode { get; set; }
+            public string pmname { get; set; }
+        }
+        class ts_tflowversion
+        {
+            public string fvcode { get; set; }
+            public string pmcode { get; set; }
+            public int isdefault { get; set; }
+        }
+        class ts_tproflow
+        {
+            public string fvcode { get; set; }
+            public string techcode { get; set; }
+        }
+        class ts_tproduct_catering
+        {
+            public string code { get; set; }
+            public string plancode { get; set; }
+        }
+        class ts_tproduct_catering_detail
+        {
+            public string pccode { get; set; }
+        }
+        class ts_tmain_record
+        {
+            public string code { get; set; }
+            public string barcode { get; set; }
+        }
+        class ts_tprocess_record
+        {
+            public string mrcode { get; set; }
+            public string barcode { get; set; }
+            public string techcode { get; set; }
+            public int assemres { get; set; }
+        }
+
         class ts_lawsuit
         {
             public Guid id { get; set; }
diff --git a/FreeSql/Internal/CommonExpression.cs b/FreeSql/Internal/CommonExpression.cs
index 3e7ea011..22af9661 100644
--- a/FreeSql/Internal/CommonExpression.cs
+++ b/FreeSql/Internal/CommonExpression.cs
@@ -1009,8 +1009,11 @@ namespace FreeSql.Internal
                                                 {
                                                     if (fsqltable1SetAlias == false)
                                                     {
-                                                        fsqltables[0].Alias = (argExp as LambdaExpression).Parameters.First().Name;
                                                         fsqltable1SetAlias = true;
+                                                        var argExpLambda = argExp as LambdaExpression;
+                                                        var fsqlTypeGenericArgs = fsqlType.GetGenericArguments();
+                                                        for (var gai = 0; gai < fsqlTypeGenericArgs.Length && gai < argExpLambda.Parameters.Count; gai++)
+                                                            fsqltables[gai].Alias = argExpLambda.Parameters[gai].Name;
                                                     }
                                                 }
                                                 args[a] = argExp ?? Expression.Lambda(arg3Exp).Compile().DynamicInvoke();
diff --git a/FreeSql/Internal/CommonProvider/UpdateProvider.cs b/FreeSql/Internal/CommonProvider/UpdateProvider.cs
index 2f8aed58..619c20c0 100644
--- a/FreeSql/Internal/CommonProvider/UpdateProvider.cs
+++ b/FreeSql/Internal/CommonProvider/UpdateProvider.cs
@@ -457,6 +457,11 @@ namespace FreeSql.Internal.CommonProvider
         {
             var body = exp?.Body;
             var nodeType = body?.NodeType;
+            if (nodeType == ExpressionType.Convert)
+            {
+                body = (body as UnaryExpression)?.Operand;
+                nodeType = body?.NodeType;
+            }
             switch (nodeType)
             {
                 case ExpressionType.Equal:
@@ -499,7 +504,7 @@ namespace FreeSql.Internal.CommonProvider
             if (body is BinaryExpression == false &&
                 nodeType != ExpressionType.Call) return this;
             var cols = new List<SelectColumnInfo>();
-            var expt = _commonExpression.ExpressionWhereLambdaNoneForeignObject(null, _table, cols, exp, null, null);
+            var expt = _commonExpression.ExpressionWhereLambdaNoneForeignObject(null, _table, cols, body, null, null);
             if (cols.Any() == false) return this;
             foreach (var col in cols)
             {