[doc](fix) fix date trunc doc (#27317)

apache · Nov 21, 2023 · 402095b · 402095b
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diff --git a/docs/en/docs/sql-manual/sql-functions/date-time-functions/date-trunc.md b/docs/en/docs/sql-manual/sql-functions/date-time-functions/date-trunc.md
@@ -26,12 +26,8 @@ under the License.
 
 ## date_trunc
 
-<version since="1.2.0"> 
-
 date_trunc
 
-</version>
-
 ### Description
 #### Syntax
 
@@ -42,8 +38,8 @@ Truncates datetime in the specified time unit.
 
 datetime is a legal date expression.
 
-unit is the time unit you want to truncate. The optional values are as follows: [`second`,`minute`,`hour`,`day`,`week`,`month`,`quarter`,`year`]。
-If unit does not meet the above optional values, the result will return NULL.
+unit is the time unit you want to truncate. The optional values are as follows: [`second`,`minute`,`hour`,`day`,`week`,`month`,`quarter`,`year`].
+
 ### example
 
 ```
@@ -104,4 +100,5 @@ mysql> select date_trunc('2010-12-02 19:28:30', 'year');
 +-------------------------------------------------+
 ```
 ### keywords
-    DATE_TRUNC,DATE,DATETIME
+
+DATE_TRUNC,DATE,DATETIME
diff --git a/docs/zh-CN/docs/sql-manual/sql-functions/date-time-functions/date-trunc.md b/docs/zh-CN/docs/sql-manual/sql-functions/date-time-functions/date-trunc.md
@@ -26,12 +26,8 @@ under the License.
 
 ## date_trunc
 
-<version since="1.2.0"> 
-
 date_trunc
 
-</version>
-
 ### description
 #### Syntax
 
@@ -43,7 +39,7 @@ date_trunc
 datetime 参数是合法的日期表达式。
 
 unit 参数是您希望截断的时间间隔，可选的值如下：[`second`,`minute`,`hour`,`day`,`week`,`month`,`quarter`,`year`]。
-如果unit 不符合上述可选值，结果将返回NULL。 
+
 ### example
 
 ```
@@ -106,4 +102,4 @@ mysql> select date_trunc('2010-12-02 19:28:30', 'year');
 
 ### keywords
 
-    DATE_TRUNC,DATE,TRUNC
+DATE_TRUNC,DATE,TRUNC