diff --git a/Hadoop/ZKLT.Hadoop.Interface/ITableService.cs b/Hadoop/ZKLT.Hadoop.Interface/ITableService.cs
index b637140..10b2a6c 100644
--- a/Hadoop/ZKLT.Hadoop.Interface/ITableService.cs
+++ b/Hadoop/ZKLT.Hadoop.Interface/ITableService.cs
@@ -62,7 +62,7 @@ namespace ZKLT.Hadoop.Interface
         /// <param name="where">条件</param>
         /// <param name="row">数据</param>
         /// <returns>结果</returns>
-        public T? QuerySingle<T>(HDP_Source source, HDP_Table table, Dictionary<string, string> where, Dictionary<string, object> row);
+        public T? QuerySingle<T>(HDP_Source source, HDP_Table table, Dictionary<string, string> where, Dictionary<string, object> row, string[]? col);
 
         /// <summary>
         /// 查询列表
@@ -73,7 +73,7 @@ namespace ZKLT.Hadoop.Interface
         /// <param name="where">条件</param>
         /// <param name="row">数据</param>
         /// <returns>结果集</returns>
-        public T[] Query<T>(HDP_Source source, HDP_Table table, Dictionary<string, string>? where = null, Dictionary<string, object>? row = null, Dictionary<string, string>? order = null);
+        public T[] Query<T>(HDP_Source source, HDP_Table table, Dictionary<string, string>? where, Dictionary<string, object>? row, Dictionary<string, string>? order, string[]? col);
 
         /// <summary>
         /// 查询列表
@@ -84,7 +84,7 @@ namespace ZKLT.Hadoop.Interface
         /// <param name="where">条件</param>
         /// <param name="row">数据</param>
         /// <returns>结果集</returns>
-        public HDP_Page<T> QueryPage<T>(HDP_Source source, HDP_Table table, int pageIndex, int pageSize, Dictionary<string, string>? where = null, Dictionary<string, object>? row = null, Dictionary<string, string>? order = null);
+        public HDP_Page<T> QueryPage<T>(HDP_Source source, HDP_Table table, int pageIndex, int pageSize, Dictionary<string, string>? where, Dictionary<string, object>? row, Dictionary<string, string>? order, string[]? col);
 
 
         /// <summary>
diff --git a/Hadoop/ZKLT.Hadoop.Model/HDP_Command.cs b/Hadoop/ZKLT.Hadoop.Model/HDP_Command.cs
index 4931ac8..aa0c339 100644
--- a/Hadoop/ZKLT.Hadoop.Model/HDP_Command.cs
+++ b/Hadoop/ZKLT.Hadoop.Model/HDP_Command.cs
@@ -21,6 +21,8 @@ namespace ZKLT.Hadoop.Model
 
         private string? _Type;
 
+        private string[]? _Col;
+
         private Dictionary<string, string>? _Where;
 
         private Dictionary<string, object>? _Data;
@@ -66,5 +68,10 @@ namespace ZKLT.Hadoop.Model
         /// 命令类型
         /// </summary>
         public string? Type { get => _Type; set => _Type = value; }
+
+        /// <summary>
+        /// 列
+        /// </summary>
+        public string[]? Col { get => _Col; set => _Col = value; }
     }
 }
diff --git a/Hadoop/ZKLT.Hadoop/HadoopService.cs b/Hadoop/ZKLT.Hadoop/HadoopService.cs
index 79b77ba..0872e8e 100644
--- a/Hadoop/ZKLT.Hadoop/HadoopService.cs
+++ b/Hadoop/ZKLT.Hadoop/HadoopService.cs
@@ -145,7 +145,7 @@ namespace ZKLT.Hadoop
                 { "Id","=" }
             }, new Dictionary<string, object> {
                 { "Id",sourceid}
-            });
+            }, null);
             return _result;
         }
 
@@ -262,7 +262,7 @@ namespace ZKLT.Hadoop
         /// <returns>结果</returns>
         public HDP_Source[] QuerySource(HDP_Command command)
         {
-            return _TableService.Query<HDP_Source>(_Source, GetTable("HDP_Source")!, command.Where!, command.Data!, command.Order!);
+            return _TableService.Query<HDP_Source>(_Source, GetTable("HDP_Source")!, command.Where!, command.Data!, command.Order!, command.Col);
         }
 
         /// <summary>
@@ -287,7 +287,7 @@ namespace ZKLT.Hadoop
                 { "Id","=" }
             }, new Dictionary<string, object> {
                 { "Id",tableid}
-            });
+            }, null);
 
             if (_result != null)
             {
@@ -295,7 +295,7 @@ namespace ZKLT.Hadoop
                     { "TableId","="}
                 }, new Dictionary<string, object> {
                     {"TableId",_result.Id! }
-                });
+                }, null, null);
             }
 
             return _result;
@@ -376,7 +376,7 @@ namespace ZKLT.Hadoop
                         if (_TableService.QuerySingle<HDP_Column>(_Source, GetTable("HDP_Column")!, new Dictionary<string, string>
                         {
                             {"Id","=" }
-                        }, HDP_Table.Class2Dictionary(_column)) == null)
+                        }, HDP_Table.Class2Dictionary(_column), null) == null)
                         {
                             if (!_TableService.Insert(_Source, GetTable("HDP_Column")!, HDP_Table.Class2Dictionary(_column)))
                             {
@@ -452,7 +452,7 @@ namespace ZKLT.Hadoop
         /// <returns>结果</returns>
         public HDP_Table[] QueryTable(HDP_Command command)
         {
-            return _TableService.Query<HDP_Table>(_Source, GetTable("HDP_Table")!, command.Where!, command.Data!, command.Order!);
+            return _TableService.Query<HDP_Table>(_Source, GetTable("HDP_Table")!, command.Where!, command.Data!, command.Order!, command.Col!);
         }
 
         /// <summary>
@@ -533,7 +533,7 @@ namespace ZKLT.Hadoop
                 throw new ArgumentException("表不存在");
             }
             var _source = GetSource(_table.SourceId!);
-            return _TableService.QuerySingle<T>(_source!, _table, command.Where!, command.Data!);
+            return _TableService.QuerySingle<T>(_source!, _table, command.Where!, command.Data!, command.Col);
         }
 
         /// <summary>
@@ -554,7 +554,7 @@ namespace ZKLT.Hadoop
                 throw new ArgumentException("表不存在");
             }
             var _source = GetSource(_table.SourceId!);
-            return _TableService.Query<T>(_source!, _table, command.Where!, command.Data!, command.Order!);
+            return _TableService.Query<T>(_source!, _table, command.Where!, command.Data!, command.Order!, command.Col);
         }
 
         /// <summary>
@@ -583,7 +583,7 @@ namespace ZKLT.Hadoop
                 throw new ArgumentException("表不存在");
             }
             var _source = GetSource(_table.SourceId!);
-            return _TableService.QueryPage<T>(_source!, _table, (int)command.PageIndex, (int)command.PageSize, command.Where!, command.Data!, command.Order!);
+            return _TableService.QueryPage<T>(_source!, _table, (int)command.PageIndex, (int)command.PageSize, command.Where!, command.Data!, command.Order!, command.Col!);
         }
 
         /// <summary>
diff --git a/Hadoop/ZKLT.Hadoop/TableService.cs b/Hadoop/ZKLT.Hadoop/TableService.cs
index 0d3658a..fee0a39 100644
--- a/Hadoop/ZKLT.Hadoop/TableService.cs
+++ b/Hadoop/ZKLT.Hadoop/TableService.cs
@@ -51,6 +51,33 @@ namespace ZKLT.Hadoop
             }
         }
 
+        /// <summary>
+        /// 合并列
+        /// </summary>
+        /// <param name="table">表</param>
+        /// <param name="cols">列</param>
+        /// <param name="command">命令</param>
+        private void MergeCols(HDP_Table table, string[]? cols, StringBuilder command)
+        {
+            if (cols == null || cols.Length == 0)
+            {
+                command.AppendLine(" * ");
+            }
+            StringBuilder _colstr = new StringBuilder();
+            for (var i = 0; i < table.Columns!.Length; i++)
+            {
+                if (cols!.Any(x => x == table.Columns[i].Key))
+                {
+                    _colstr.Append($@"`{table.Columns[i].Key}`,");
+                }
+            }
+            if (_colstr[_colstr.Length - 1] == ',')
+            {
+                _colstr.Remove(_colstr.Length - 1, 1);
+            }
+            command.AppendLine(_colstr.ToString());
+        }
+
         /// <summary>
         /// 同步结构
         /// </summary>
@@ -504,7 +531,8 @@ namespace ZKLT.Hadoop
         /// <param name="where">条件</param>
         /// <param name="row">数据</param>
         /// <returns>结果</returns>
-        public T? QuerySingle<T>(HDP_Source source, HDP_Table table, Dictionary<string, string> where, Dictionary<string, object> row)
+        public T? QuerySingle<T>(HDP_Source source, HDP_Table table, Dictionary<string, string> where, Dictionary<string, object> row, 
+            string[]? col)
         {
             //数据校验
             if (string.IsNullOrEmpty(table.Key))
@@ -537,7 +565,16 @@ namespace ZKLT.Hadoop
                 //查询命令
                 StringBuilder _command = new StringBuilder();
                 Dictionary<string, object> _params = new Dictionary<string, object>();
-                _command.AppendLine(@$"SELECT * FROM `{table.Key}`");
+                if (col == null || col.Length == 0)
+                {
+                    _command.AppendLine(@$"SELECT * FROM `{table.Key}`");
+                }
+                else
+                {
+                    _command.AppendLine("SELECT");
+                    MergeCols(table, col, _command);
+                    _command.AppendLine($@"FROM `{table.Key}`");
+                }
 
                 //执行条件
                 MergeWhere(table, where, row, _command, _params);
@@ -564,7 +601,8 @@ namespace ZKLT.Hadoop
         /// <param name="where">条件</param>
         /// <param name="row">数据</param>
         /// <returns>结果集</returns>
-        public T[] Query<T>(HDP_Source source, HDP_Table table, Dictionary<string, string>? where = null, Dictionary<string, object>? row = null, Dictionary<string, string>? order = null)
+        public T[] Query<T>(HDP_Source source, HDP_Table table, Dictionary<string, string>? where, Dictionary<string, object>? row, 
+            Dictionary<string, string>? order, string[]? col)
         {
             //数据校验
             if (string.IsNullOrEmpty(table.Key))
@@ -589,7 +627,16 @@ namespace ZKLT.Hadoop
                 //查询命令
                 StringBuilder _command = new StringBuilder();
                 Dictionary<string, object> _params = new Dictionary<string, object>();
-                _command.AppendLine(@$"SELECT * FROM `{table.Key}`");
+                if (col == null || col.Length == 0)
+                {
+                    _command.AppendLine(@$"SELECT * FROM `{table.Key}`");
+                }
+                else
+                {
+                    _command.AppendLine("SELECT");
+                    MergeCols(table, col, _command);
+                    _command.AppendLine($@"FROM `{table.Key}`");
+                }
 
                 //执行条件
                 MergeWhere(table, where, row, _command, _params);
@@ -636,7 +683,8 @@ namespace ZKLT.Hadoop
         /// <param name="where">条件</param>
         /// <param name="row">数据</param>
         /// <returns>结果集</returns>
-        public HDP_Page<T> QueryPage<T>(HDP_Source source, HDP_Table table, int pageIndex, int pageSize, Dictionary<string, string>? where = null, Dictionary<string, object>? row = null, Dictionary<string, string>? order = null)
+        public HDP_Page<T> QueryPage<T>(HDP_Source source, HDP_Table table, int pageIndex, int pageSize, Dictionary<string, string>? where, 
+            Dictionary<string, object>? row, Dictionary<string, string>? order, string[]? col)
         {
             //数据校验
             if (string.IsNullOrEmpty(table.Key))
@@ -661,7 +709,16 @@ namespace ZKLT.Hadoop
                 //查询命令
                 StringBuilder _command = new StringBuilder();
                 Dictionary<string, object> _params = new Dictionary<string, object>();
-                _command.AppendLine(@$"SELECT * FROM `{table.Key}`");
+                if (col == null || col.Length == 0)
+                {
+                    _command.AppendLine(@$"SELECT * FROM `{table.Key}`");
+                }
+                else
+                {
+                    _command.AppendLine("SELECT");
+                    MergeCols(table, col, _command);
+                    _command.AppendLine($@"FROM `{table.Key}`");
+                }
 
                 //执行条件
                 MergeWhere(table, where, row, _command, _params);