diff --git a/Examples/base_entity/Program.cs b/Examples/base_entity/Program.cs
index bcb43906..3dad8a00 100644
--- a/Examples/base_entity/Program.cs
+++ b/Examples/base_entity/Program.cs
@@ -487,6 +487,22 @@ namespace base_entity
             BaseEntity.Initialization(fsql, () => _asyncUow.Value);
             #endregion
 
+            var groupsql01 = fsql.Select<User1>()
+                .GroupBy(a => new
+                {
+                    djjg = a.Id,
+                    qllx = a.Nickname,
+                    hjhs = a.GroupId
+                })
+                .ToSql(g => new
+                {
+                    g.Key.djjg,
+                    g.Key.qllx,
+                    xhjsl = g.Count(g.Key.djjg),
+                    hjzhs = g.Sum(g.Key.hjhs),
+                    blywsl = g.Count()
+                }, FieldAliasOptions.AsProperty);
+
             using (var uow = fsql.CreateUnitOfWork())
             {
                 uow.Orm.Select<User1>().ForUpdate().ToList();
diff --git a/FreeSql/Internal/CommonExpression.cs b/FreeSql/Internal/CommonExpression.cs
index 671a7e7c..656de788 100644
--- a/FreeSql/Internal/CommonExpression.cs
+++ b/FreeSql/Internal/CommonExpression.cs
@@ -277,15 +277,23 @@ namespace FreeSql.Internal
                             return false;
                         }
                         if (parent.CsType == null) parent.CsType = exp.Type;
-                        var pdbfield = parent.DbField = ExpressionLambdaToSql(exp, getTSC());
-                        if (parent.MapType == null || _tables?.Any(a => a.Table?.IsRereadSql == true) == true)
+                        try
                         {
-                            var findcol = SearchColumnByField(_tables, null, parent.DbField);
-                            if (parent.MapType == null) parent.MapType = findcol?.Attribute.MapType ?? exp.Type;
-                            if (findcol != null) pdbfield = _common.RereadColumn(findcol, pdbfield);
+                            var pdbfield = parent.DbField = ExpressionLambdaToSql(exp, getTSC());
+                            if (parent.MapType == null || _tables?.Any(a => a.Table?.IsRereadSql == true) == true)
+                            {
+                                var findcol = SearchColumnByField(_tables, null, parent.DbField);
+                                if (parent.MapType == null) parent.MapType = findcol?.Attribute.MapType ?? exp.Type;
+                                if (findcol != null) pdbfield = _common.RereadColumn(findcol, pdbfield);
+                            }
+                            field.Append(", ").Append(pdbfield);
+                            LocalSetFieldAlias(ref index, _tables != null ||
+                                SelectGroupingProvider._ParseExpOnlyDbField.Value != pdbfield);
+                        }
+                        finally
+                        {
+                            SelectGroupingProvider._ParseExpOnlyDbField.Value = null;
                         }
-                        field.Append(", ").Append(pdbfield);
-                        LocalSetFieldAlias(ref index, true);
                         return false;
                     }
                     return false;
diff --git a/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs b/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
index 7d26c47e..c719221f 100644
--- a/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
+++ b/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
@@ -31,6 +31,7 @@ namespace FreeSql.Internal.CommonProvider
             _tables = tables;
         }
 
+        public static ThreadLocal<string> _ParseExpOnlyDbField = new ThreadLocal<string>();
         public override string ParseExp(Expression[] members)
         {
             ParseExpMapResult = null;
@@ -52,7 +53,11 @@ namespace FreeSql.Internal.CommonProvider
                     }
                     ParseExpMapResult = read;
                     if (!_addFieldAlias) return read.DbField;
-                    if (_comonExp.EndsWithDbNestedField(read.DbField, read.DbNestedField) == false) return $"{read.DbField}{_comonExp._common.FieldAsAlias(read.DbNestedField)}";
+                    if (_comonExp.EndsWithDbNestedField(read.DbField, read.DbNestedField) == false)
+                    {
+                        _ParseExpOnlyDbField.Value = read.DbField;
+                        return $"{read.DbField}{_comonExp._common.FieldAsAlias(read.DbNestedField)}";
+                    }
                     return read.DbField;
                 case "Value":
                     var curtables = _tables;