diff --git a/docs/en/12-taos-sql/06-select.md b/docs/en/12-taos-sql/06-select.md
index 2606b183b8..2c94787440 100755
--- a/docs/en/12-taos-sql/06-select.md
+++ b/docs/en/12-taos-sql/06-select.md
@@ -9,7 +9,7 @@ description: This document describes how to query data in TDengine.
 ```sql
 SELECT {DATABASE() | CLIENT_VERSION() | SERVER_VERSION() | SERVER_STATUS() | NOW() | TODAY() | TIMEZONE() | CURRENT_USER() | USER() }
 
-SELECT [hints] [DISTINCT] select_list
+SELECT [hints] [DISTINCT] [TAGS] select_list
     from_clause
     [WHERE condition]
     [partition_by_clause]
@@ -182,7 +182,7 @@ The TBNAME pseudocolumn in a supertable contains the names of subtables within t
 The following SQL statement returns all unique subtable names and locations within the meters supertable:
 
 ```mysql
-SELECT DISTINCT TBNAME, location FROM meters;
+SELECT TAGS TBNAME, location FROM meters;
 ```
 
 Use the `INS_TAGS` system table in `INFORMATION_SCHEMA` to query the information for subtables in a supertable. For example, the following statement returns the name and tag values for each subtable in the `meters` supertable.
@@ -227,6 +227,14 @@ The \_IROWTS pseudocolumn can only be used with INTERP function. This pseudocolu
 select _irowts, interp(current) from meters range('2020-01-01 10:00:00', '2020-01-01 10:30:00') every(1s) fill(linear);
 ```
 
+### TAGS Query
+
+The TAGS keyword returns only tag columns from all child tables when only tag columns are specified. One row containing tag columns is returned for each child table.
+
+```sql
+SELECT TAGS tag_name [, tag_name ...] FROM stb_name
+```
+
 ## Query Objects
 
 `FROM` can be followed by a number of tables or super tables, or can be followed by a sub-query.
diff --git a/docs/zh/12-taos-sql/06-select.md b/docs/zh/12-taos-sql/06-select.md
index 23ae025610..3c6e4f3bcf 100755
--- a/docs/zh/12-taos-sql/06-select.md
+++ b/docs/zh/12-taos-sql/06-select.md
@@ -9,7 +9,7 @@ description: 查询数据的详细语法
 ```sql
 SELECT {DATABASE() | CLIENT_VERSION() | SERVER_VERSION() | SERVER_STATUS() | NOW() | TODAY() | TIMEZONE() | CURRENT_USER() | USER() }
 
-SELECT [hints] [DISTINCT] select_list
+SELECT [hints] [DISTINCT] [TAGS] select_list
     from_clause
     [WHERE condition]
     [partition_by_clause]
@@ -162,6 +162,16 @@ SELECT DISTINCT col_name [, col_name ...] FROM tb_name;
 
 :::
 
+### 标签查询
+
+当查询的列只有标签列时，`TAGS` 关键字可以指定返回所有子表的标签列。每个子表只返回一行标签列。
+
+返回所有子表的标签列：
+
+```sql
+SELECT TAGS tag_name [, tag_name ...] FROM stb_name
+``` 
+
 ### 结果集列名
 
 `SELECT`子句中，如果不指定返回结果集合的列名，结果集列名称默认使用`SELECT`子句中的表达式名称作为列名称。此外，用户可使用`AS`来重命名返回结果集合中列的名称。例如：
@@ -182,7 +192,7 @@ taos> SELECT ts, ts AS primary_key_ts FROM d1001;
 获取一个超级表所有的子表名及相关的标签信息：
 
 ```mysql
-SELECT DISTINCT TBNAME, location FROM meters;
+SELECT TAGS TBNAME, location FROM meters;
 ```
 
 建议用户使用 INFORMATION_SCHEMA 下的 INS_TAGS 系统表来查询超级表的子表标签信息，例如获取超级表 meters 所有的子表名和标签值：