diff --git a/product/en/docs-mogdb/v2.1/reference-guide/sql-syntax/74-DELETE.md b/product/en/docs-mogdb/v2.1/reference-guide/sql-syntax/74-DELETE.md
index bf19c08e12052eb517499165d7fba24501b0f6cd..14b6e177965eb05eda574695ee545557e8e33117 100644
--- a/product/en/docs-mogdb/v2.1/reference-guide/sql-syntax/74-DELETE.md
+++ b/product/en/docs-mogdb/v2.1/reference-guide/sql-syntax/74-DELETE.md
@@ -20,7 +20,7 @@ date: 2021-05-10
 
 ```ebnf+diagram
 Delete ::= [ WITH [ RECURSIVE ] with_query [, ...] ]
-DELETE [/*+ plan_hint */] FROM [ ONLY ] table_name [ * ] [ [ AS ] alias ]
+DELETE [/*+ plan_hint */] [ FROM ] [ ONLY ] table_name [ * ] [ [ AS ] alias ]
     [ USING using_list ]
     [ WHERE condition | WHERE CURRENT OF cursor_name ]
     [ RETURNING { * | { output_expr [ [ AS ] output_name ] } [, ...] } ];
@@ -36,16 +36,15 @@ DELETE [/*+ plan_hint */] FROM [ ONLY ] table_name [ * ] [ [ AS ] alias ]
 
   Format of **with_query**:
 
-  ```sql
-  with_query_name [ ( column_name [, ...] ) ] AS
-
+  ```ebnf+diagram
+  with_query_name ::= with_query_name [ ( column_name [, ...] ) ] AS
   ( {select | values | insert | update | delete} )
   ```
-
+  
   - **with_query_name** specifies the name of the result set generated by a subquery. Such names can be used to access the subquery result set.
   - **column_name** specifies the column name displayed in the subquery result set.
   - Each subquery can be a **SELECT**, **VALUES**, **INSERT**, **UPDATE** or **DELETE** statement.
-
+  
 - **plan_hint** clause
 
   Follows the **DELETE** keyword in the **/\*+ \*/** format. It is used to optimize the plan of a **DELETE** statement block. For details, see [Hint-based Tuning](9-hint-based-tuning). In each statement, only the first **/\*+** _plan_hint _***/** comment block takes effect as a hint. Multiple hints can be written.
diff --git a/product/zh/docs-mogdb/v2.1/reference-guide/sql-syntax/74-DELETE.md b/product/zh/docs-mogdb/v2.1/reference-guide/sql-syntax/74-DELETE.md
index 95faa18ef1fd972b67e1f58f40b72f37ef4f4d33..1c9b230e6fc579207056bd8ba914642e9edda147 100644
--- a/product/zh/docs-mogdb/v2.1/reference-guide/sql-syntax/74-DELETE.md
+++ b/product/zh/docs-mogdb/v2.1/reference-guide/sql-syntax/74-DELETE.md
@@ -1,8 +1,8 @@
 ---
 title: DELETE
 summary: DELETE
-author: Zhang Cuiping
-date: 2021-05-10
+author: GUO HUAN
+date: 2022-04-15
 ---
 
 # DELETE
@@ -20,7 +20,7 @@ DELETE从指定的表里删除满足WHERE子句的行。如果WHERE子句不存
 
 ```ebnf+diagram
 Delete ::= [ WITH [ RECURSIVE ] with_query [, ...] ]
-DELETE FROM [ ONLY ] table_name [ * ] [ [ AS ] alias ]
+DELETE [/*+ plan_hint */] [ FROM ] [ ONLY ] table_name [ * ] [ [ AS ] alias ]
     [ USING using_list ]
     [ WHERE condition | WHERE CURRENT OF cursor_name ]
     [ RETURNING { * | { output_expr [ [ AS ] output_name ] } [, ...] } ];
@@ -30,22 +30,25 @@ DELETE FROM [ ONLY ] table_name [ * ] [ [ AS ] alias ]
 
 - **WITH [ RECURSIVE ] with_query [, …]**
 
-    用于声明一个或多个可以在主查询中通过名称引用的子查询，相当于临时表。
+  用于声明一个或多个可以在主查询中通过名称引用的子查询，相当于临时表。
 
-    如果声明了RECURSIVE，那么允许SELECT子查询通过名称引用它自己。
+  如果声明了RECURSIVE，那么允许SELECT子查询通过名称引用它自己。
 
-    其中with_query的详细格式为：
+  其中with_query的详细格式为：
 
-    with_query_name [ ( column_name [, …] ) ] AS
-
-    ( {select | values | insert | update | delete} )
+  ```ebnf+diagram
+  with_query_name ::= with_query_name [ ( column_name [, ...] ) ] AS
+  ( {select | values | insert | update | delete} )
+  ```
 
   - with_query_name指定子查询生成的结果集名称，在查询中可使用该名称访问子查询的结果集。
-
   - column_name指定子查询结果集中显示的列名。
-
   - 每个子查询可以是SELECT，VALUES，INSERT，UPDATE或DELETE语句。
 
+- **plan_hint子句**
+
+  以`/*+ */`的形式在DELETE关键字后，用于对DELETE对应的语句块生成的计划进行hint调优，详细用法请参见章节[使用Plan Hint进行调优](9-hint-based-tuning)。每条语句中只有第一个`/*+ plan_hint */`注释块会作为hint生效，里面可以写多条hint。
+
 - **ONLY**
 
   如果指定ONLY则只有该表被删除；如果没有声明，则该表和它的所有子表将都被删除。