bingquanzhao commented on code in PR #1805:
URL: https://github.com/apache/doris-website/pull/1805#discussion_r1917852236
##########
docs/sql-manual/sql-functions/scalar-functions/date-time-functions/months-add.md:
##########
@@ -24,27 +24,40 @@ specific language governing permissions and limitations
under the License.
-->
-## months_add
-### description
-#### Syntax
+## Description
+The MONTHS_ADD function is used to add or subtract a specified number of
months to a given date and returns the resulting date.
-`DATETIME MONTHS_ADD(DATETIME date, INT months)`
+## Syntax
-Add the specified month from the date
+`DATETIME MONTHS_ADD(DATETIME/DATE <datetime/date>, INT <nums>)`
-The parameter date can be DATETIME or DATE, and the return type is consistent
with that of the parameter date.
+## Parameters
-### example
+| Parameter | Description
|
+|-------------------|------------------------------------------------------------|
+| `<datetime/date>` | The date value to which months will be added or
subtracted |
+| `<nums>` | The number of months to add or subtract
|
+## Return Value
+The return value is of the same type as the input <datetime/date>.
+Special cases:
+- If the <datetime/date> input is 0000-00-00 or 0000-00-00 00:00:00, the
function returns NULL.
+- If the <datetime/date> input is NULL, the function returns NULL.
+- If the input is MONTHS_ADD("9999-12-31", 1), the function will return NULL.
+
+## Example
+
+``` sql
+select months_add("2020-01-31 02:02:02", 1),months_add("2020-01-31",
1),months_add("2020-01-31", -1);
```
-mysql> select months_add("2020-01-31 02:02:02", 1);
-+--------------------------------------+
-| months_add('2020-01-31 02:02:02', 1) |
-+--------------------------------------+
-| 2020-02-29 02:02:02 |
-+--------------------------------------+
+```text
++-------------------------------------------------------------+---------------------------------------------+----------------------------------------------+
+| months_add(cast('2020-01-31 02:02:02' as DATETIMEV2(0)), 1) |
months_add(cast('2020-01-31' as DATEV2), 1) | months_add(cast('2020-01-31' as
DATEV2), -1) |
++-------------------------------------------------------------+---------------------------------------------+----------------------------------------------+
+| 2020-02-29 02:02:02 | 2020-02-29
| 2019-12-31 |
++-------------------------------------------------------------+---------------------------------------------+----------------------------------------------+
```
-### keywords
+## keywords
Review Comment:
get
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