diff --git a/FreeSql/Internal/CommonExpression.cs b/FreeSql/Internal/CommonExpression.cs
index 9154c696..073aa1a1 100644
--- a/FreeSql/Internal/CommonExpression.cs
+++ b/FreeSql/Internal/CommonExpression.cs
@@ -41,6 +41,7 @@ namespace FreeSql.Internal
         }
 
         internal const int ReadAnonymousFieldAsCsName = -53129;
+        internal const int ReadAnonymousFieldAsCsNameGroupBy = -10000;
         internal string GetFieldAsCsName(string csname)
         {
             csname = _common.QuoteSqlName(csname);
@@ -48,19 +49,19 @@ namespace FreeSql.Internal
             if (_common.CodeFirst.IsSyncStructureToUpper) csname = csname.ToUpper();
             return csname;
         }
+        internal bool EndsWithDbNestedField(string dbField, string dbNestedField)
+        {
+            switch (_ado.DataType)
+            {
+                case DataType.SqlServer:
+                case DataType.OdbcSqlServer:
+                    return dbField.EndsWith(dbNestedField, StringComparison.CurrentCultureIgnoreCase);
+            }
+            return dbField.EndsWith(dbNestedField);
+        }
         public bool ReadAnonymousField(List<SelectTableInfo> _tables, Func<Type, string, string> _tableRule, StringBuilder field, ReadAnonymousTypeInfo parent, ref int index, Expression exp, Select0Provider select,
             BaseDiyMemberExpression diymemexp, List<GlobalFilter.Item> whereGlobalFilter, List<string> findIncludeMany, List<Expression> findSubSelectMany, bool isAllDtoMap)
         {
-            bool LocalEndsWithField(string dbField, string dbNestedField)
-            {
-                switch (_ado.DataType)
-                {
-                    case DataType.SqlServer:
-                    case DataType.OdbcSqlServer:
-                        return dbField.EndsWith(dbNestedField, StringComparison.CurrentCultureIgnoreCase);
-                }
-                return dbField.EndsWith(dbNestedField);
-            }
             void LocalSetFieldAlias(ref int localIndex, bool isdiymemexp)
             {
                 if (localIndex >= 0)
@@ -73,7 +74,7 @@ namespace FreeSql.Internal
                 else if (string.IsNullOrEmpty(parent.CsName) == false)
                 {
                     parent.DbNestedField = GetFieldAsCsName(parent.CsName);
-                    if (localIndex == ReadAnonymousFieldAsCsName && LocalEndsWithField(parent.DbField, parent.DbNestedField) == false) //DbField 和 CsName 相同的时候，不处理
+                    if (localIndex == ReadAnonymousFieldAsCsName && EndsWithDbNestedField(parent.DbField, parent.DbNestedField) == false) //DbField 和 CsName 相同的时候，不处理
                         field.Append(_common.FieldAsAlias(parent.DbNestedField));
                 }
             }
@@ -264,7 +265,7 @@ namespace FreeSql.Internal
                                 else if (string.IsNullOrEmpty(parent.CsName) == false)
                                 {
                                     dbNestedField = GetFieldAsCsName(parent.CsName);
-                                    if (index == ReadAnonymousFieldAsCsName && LocalEndsWithField(diymemexp._field, dbNestedField) == false) //DbField 和 CsName 相同的时候，不处理
+                                    if (index == ReadAnonymousFieldAsCsName && EndsWithDbNestedField(diymemexp._field, dbNestedField) == false) //DbField 和 CsName 相同的时候，不处理
                                         field.Append(_common.FieldAsAlias(dbNestedField));
                                 }
                             }
diff --git a/FreeSql/Internal/CommonProvider/SelectProvider/Select0ProviderReader.cs b/FreeSql/Internal/CommonProvider/SelectProvider/Select0ProviderReader.cs
index 97b3568c..97207fbc 100644
--- a/FreeSql/Internal/CommonProvider/SelectProvider/Select0ProviderReader.cs
+++ b/FreeSql/Internal/CommonProvider/SelectProvider/Select0ProviderReader.cs
@@ -815,7 +815,7 @@ namespace FreeSql.Internal.CommonProvider
         {
             var map = new ReadAnonymousTypeInfo();
             var field = new StringBuilder();
-            var index = -10000; //临时规则，不返回 as1
+            var index = CommonExpression.ReadAnonymousFieldAsCsNameGroupBy; //临时规则，不返回 as1
 
             _commonExpression.ReadAnonymousField(_tables, _tableRule, field, map, ref index, columns, null, _diymemexpWithTempQuery, _whereGlobalFilter, null, null, false); //不走 DTO 映射，不处理 IncludeMany
             var sql = field.ToString();
diff --git a/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs b/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
index 6881b2e5..330503a3 100644
--- a/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
+++ b/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
@@ -19,6 +19,7 @@ namespace FreeSql.Internal.CommonProvider
         public CommonExpression _comonExp;
         public List<SelectTableInfo> _tables;
         public int _groupByLimit, _groupBySkip;
+        public bool _addFieldAlias;
 
         public SelectGroupingProvider(IFreeSql orm, Select0Provider select, ReadAnonymousTypeInfo map, string field, CommonExpression comonExp, List<SelectTableInfo> tables)
         {
@@ -50,6 +51,8 @@ namespace FreeSql.Internal.CommonProvider
                         if (read == null) return null;
                     }
                     ParseExpMapResult = read;
+                    if (!_addFieldAlias) return read.DbField;
+                    if (_comonExp.EndsWithDbNestedField(read.DbField, read.DbNestedField) == false) return $"{read.DbField}{_comonExp._common.FieldAsAlias(read.DbNestedField)}";
                     return read.DbField;
                 case "Value":
                     var curtables = _tables;
@@ -240,7 +243,9 @@ namespace FreeSql.Internal.CommonProvider
             ret._whereGlobalFilter = new List<GlobalFilter.Item>(_select._whereGlobalFilter.ToArray());
             ret._cancel = _select._cancel;
             if (ret._tables[0].Table == null) ret._tables[0].Table = TableInfo.GetDefaultTable(typeof(TDto));
+            _addFieldAlias = true;
             var parser = new Select0Provider.WithTempQueryParser(_select, this, selector, ret._tables[0]);
+            _addFieldAlias = false;
             var sql = $"\r\n{this.ToSql(parser._insideSelectList[0].InsideField)}";
             ret.WithSql(sql);
             ret._diymemexpWithTempQuery = parser;