diff --git a/documentation/tdenginedocs-cn/taos-sql/index.html b/documentation/tdenginedocs-cn/taos-sql/index.html
index ec3e42d090..207bfe03fd 100644
--- a/documentation/tdenginedocs-cn/taos-sql/index.html
+++ b/documentation/tdenginedocs-cn/taos-sql/index.html
@@ -359,9 +359,9 @@ SELECT function_list FROM tb_name
 
 SELECT function_list FROM stb_name 
   [WHERE where_condition]
-  [GROUP BY tags]
+  [FILL ({ VALUE | PREV | NULL | LINEAR})]
   INTERVAL (interval)
-  [FILL ({ VALUE | PREV | NULL | LINEAR})]</code></pre>
+  [GROUP BY tags]</code></pre>
 <ul>
 <li>聚合时间段的长度由关键词INTERVAL指定，最短时间间隔10毫秒（10a）。聚合查询中，能够同时执行的聚合和选择函数仅限于单个输出的函数：count、avg、sum 、stddev、leastsquares、percentile、min、max、first、last，不能使用具有多行输出结果的函数（例如：top、bottom、diff以及四则运算）。</li>
 <li>WHERE语句可以指定查询的起止时间和其他过滤条件 </li>
diff --git a/documentation/webdocs/markdowndocs/Super Table-ch.md b/documentation/webdocs/markdowndocs/Super Table-ch.md
index c5b207b564..e75a8d46c3 100644
--- a/documentation/webdocs/markdowndocs/Super Table-ch.md	
+++ b/documentation/webdocs/markdowndocs/Super Table-ch.md	
@@ -54,7 +54,7 @@ STable从属于库，一个STable只属于一个库，但一个库可以有一
     说明：
 
     1. TAGS列总长度不能超过512 bytes；
-    2. TAGS列的数据类型不能是timestamp和nchar类型；
+    2. TAGS列的数据类型不能是timestamp；
     3. TAGS列名不能与其他列名相同;
     4. TAGS列名不能为预留关键字. 
 
@@ -218,7 +218,7 @@ GROUP BY location, type
 ```mysql
 SELECT COUNT(*), AVG(degree), MAX(degree), MIN(degree)
 FROM thermometer
-WHERE name<>'beijing' and ts>=now-1d
+WHERE location<>'beijing' and ts>=now-1d
 INTERVAL(10M)
 GROUP BY location, type
 ```
diff --git a/documentation/webdocs/markdowndocs/Super Table.md b/documentation/webdocs/markdowndocs/Super Table.md
index 79a1650924..609dd11bd2 100644
--- a/documentation/webdocs/markdowndocs/Super Table.md	
+++ b/documentation/webdocs/markdowndocs/Super Table.md	
@@ -23,7 +23,7 @@ New keyword "tags" is introduced, where tag_name is the tag name, and tag_type i
 Note：
 
 1. The bytes of all tags together shall be less than 512 
-2. Tag's data type can not be time stamp or nchar
+2. Tag's data type can not be time stamp
 3. Tag name shall be different from the field name
 4. Tag name shall not be the same as system keywords
 5. Maximum number of tags is 6 
@@ -102,7 +102,7 @@ List the number of records, average, maximum, and minimum temperature every 10 m
 ```mysql
 SELECT COUNT(*), AVG(degree), MAX(degree), MIN(degree)
 FROM thermometer
-WHERE name='beijing' and type=10 and ts>=now-1d
+WHERE location='beijing' and type=10 and ts>=now-1d
 INTERVAL(10M)
 ```
 
diff --git a/documentation/webdocs/markdowndocs/TAOS SQL-ch.md b/documentation/webdocs/markdowndocs/TAOS SQL-ch.md
index a6a1b4872a..6a8549bbd2 100644
--- a/documentation/webdocs/markdowndocs/TAOS SQL-ch.md	
+++ b/documentation/webdocs/markdowndocs/TAOS SQL-ch.md	
@@ -424,9 +424,9 @@ SELECT function_list FROM tb_name
 
 SELECT function_list FROM stb_name 
   [WHERE where_condition]
-  [GROUP BY tags]
   INTERVAL (interval)
   [FILL ({ VALUE | PREV | NULL | LINEAR})]
+  [GROUP BY tags]
 ```
 
 - 聚合时间段的长度由关键词INTERVAL指定，最短时间间隔10毫秒（10a）。聚合查询中，能够同时执行的聚合和选择函数仅限于单个输出的函数：count、avg、sum 、stddev、leastsquares、percentile、min、max、first、last，不能使用具有多行输出结果的函数（例如：top、bottom、diff以及四则运算）。
diff --git a/documentation/webdocs/markdowndocs/TAOS SQL.md b/documentation/webdocs/markdowndocs/TAOS SQL.md
index 2431514fa5..870529417f 100644
--- a/documentation/webdocs/markdowndocs/TAOS SQL.md	
+++ b/documentation/webdocs/markdowndocs/TAOS SQL.md	
@@ -474,9 +474,9 @@ SELECT function_list FROM tb_name
 
 SELECT function_list FROM stb_name 
   [WHERE where_condition]
-  [GROUP BY tags]
   INTERVAL (interval)
   [FILL ({ VALUE | PREV | NULL | LINEAR})]
+  [GROUP BY tags]
 ```
 
 The downsampling time window is defined by `interval`, which is at least 10 milliseconds. The query returns a new series of downsampled data that has a series of fixed timestamps with an increment of `interval`.