feat:[TS-5137] Support group/partition by position and alias

docs/en/12-taos-sql/06-select.md

@@ -65,10 +65,16 @@ interp_clause:
     RANGE(ts_val [, ts_val]) EVERY(every_val) FILL(fill_mod_and_val)
 
 partition_by_clause:
-    PARTITION BY expr [, expr] ...
+    PARTITION BY partition_by_expr [, partition_by_expr] ...
+
+partition_by_expr:
+    {expr | position | c_alias}
 
 group_by_clause:
-    GROUP BY expr [, expr] ... HAVING condition
+    GROUP BY group_by_expr [, group_by_expr] ... HAVING condition
+                                                    
+group_by_expr:
+    {expr | position | c_alias}
 
 order_by_clasue:
     ORDER BY order_expr [, order_expr] ...
@@ -274,7 +280,13 @@ If you use a GROUP BY clause, the SELECT list can only include the following ite
 
 The GROUP BY clause groups each row of data by the value of the expression following the clause and returns a combined result for each group.
 
-The expressions in a GROUP BY clause can include any column in any table or view. It is not necessary that the expressions appear in the SELECT list.
+In the GROUP BY clause, columns from a table or view can be grouped by specifying the column name. These columns do not need to be included in the SELECT list.
+
+You can specify integers in GROUP BY expression to indicate the expressions in the select list used for grouping. For example, 1 indicates the first item in the select list.
+
+You can specify column names in result set to indicate the expressions in the select list used for grouping.
+
+When using position and result set column names for grouping in the GROUP BY clause, the corresponding expressions in the select list must not be aggregate functions.
 
 The GROUP BY clause does not guarantee that the results are ordered. If you want to ensure that grouped data is ordered, use the ORDER BY clause.
 

docs/zh/12-taos-sql/06-select.md

@@ -65,10 +65,16 @@ interp_clause:
     RANGE(ts_val [, ts_val]) EVERY(every_val) FILL(fill_mod_and_val)
 
 partition_by_clause:
-    PARTITION BY expr [, expr] ...
+    PARTITION BY partition_by_expr [, partition_by_expr] ...
+
+partition_by_expr:
+    {expr | position | c_alias}
 
 group_by_clause:
-    GROUP BY expr [, expr] ... HAVING condition
+    GROUP BY group_by_expr [, group_by_expr] ... HAVING condition
+                                                    
+group_by_expr:
+    {expr | position | c_alias}
 
 order_by_clasue:
     ORDER BY order_expr [, order_expr] ...
@@ -274,7 +280,13 @@ TDengine 支持基于时间戳主键的 INNER JOIN，规则如下：
 
 GROUP BY 子句对每行数据按 GROUP BY 后的表达式的值进行分组，并为每个组返回一行汇总信息。
 
-GROUP BY 子句中的表达式可以包含表或视图中的任何列，这些列不需要出现在 SELECT 列表中。
+GROUP BY 子句中可以通过指定表或视图的列名来按照表或视图中的任何列分组，这些列不需要出现在 SELECT 列表中。
+
+GROUP BY 子句中可以使用位置语法，位置标识为正整数，从 1 开始，表示使用 SELECT 列表的第几个表达式进行分组。
+
+GROUP BY 子句中可以使用结果集列名，表示使用 SELECT 列表的指定表达式进行分组。
+
+GROUP BY 子句中在使用位置语法和结果集列名进行分组时，其对应的 SELECT 列表中的表达式不能是聚集函数。
 
 该子句对行进行分组，但不保证结果集的顺序。若要对分组进行排序，请使用 ORDER BY 子句