[opt](functions) update some numeric functions docs (#1811)

## Versions 

- [x] dev
- [x] 3.0
- [x] 2.1
- [ ] 2.0

## Languages

- [x] Chinese
- [x] English

## Docs Checklist

- [ ] Checked by AI
- [ ] Test Cases Built

docs/sql-manual/sql-functions/scalar-functions/numeric-functions/sqrt.md

@@ -22,40 +22,44 @@ specific language governing permissions and limitations
 under the License.
 -->
 
-## sqrt
+## Description
 
-### description
-#### Syntax
+Returns the square root of a value, where the input value must be greater than or equal to 0. Special cases:
 
-`DOUBLE sqrt(DOUBLE x)`
-Returns the square root of `x`.`x` is required to be greater than or equal to `0`.
+- If the parameter is less than 0, returns NULL.
 
-:::tip
-Another alias for this function is `dsqrt`.
-:::
+## Aliases
 
-### example
+- DSQRT
 
+## Syntax
+
+```sql
+SQRT(<a>)
 ```
-mysql> select sqrt(9);
-+-----------+
-| sqrt(9.0) |
-+-----------+
-|         3 |
-+-----------+
-mysql> select sqrt(2);
-+--------------------+
-| sqrt(2.0)          |
-+--------------------+
-| 1.4142135623730951 |
-+--------------------+
-mysql> select sqrt(100.0);
-+-------------+
-| sqrt(100.0) |
-+-------------+
-|          10 |
-+-------------+
+
+## Parameters
+
+| Parameter | Description |
+| -- | -- |
+| `<a>` | The value whose square root is to be calculated |
+
+## Return Value
+
+The square root of parameter a. Special cases:
+
+- If the parameter is less than 0, returns NULL
+
+## Example
+
+```sql
+select sqrt(9),sqrt(2),sqrt(-1)
 ```
 
-### keywords
-	SQRT, DSQRT
+```text
++-------------------------+-------------------------+--------------------------+
+| sqrt(cast(9 as DOUBLE)) | sqrt(cast(2 as DOUBLE)) | sqrt(cast(-1 as DOUBLE)) |
++-------------------------+-------------------------+--------------------------+
+|                       3 |      1.4142135623730951 |                     NULL |
++-------------------------+-------------------------+--------------------------+
+```

docs/sql-manual/sql-functions/scalar-functions/numeric-functions/tan.md

@@ -22,30 +22,36 @@ specific language governing permissions and limitations
 under the License.
 -->
 
-## tan
+## Description
 
-### description
-#### Syntax
+Returns the tangent of x, where x is the value in radians.
 
-`DOUBLE tan(DOUBLE x)`
-Returns the tangent of `x`, where `x` is in radians.
-
-### example
+## Syntax
 
+```sql
+TAN(<x>)
 ```
-mysql> select tan(0);
-+----------+
-| tan(0.0) |
-+----------+
-|        0 |
-+----------+
-mysql> select tan(1);
-+--------------------+
-| tan(1.0)           |
-+--------------------+
-| 1.5574077246549023 |
-+--------------------+
+
+## Parameters
+
+| Parameter | Description |
+| -- | -- |
+| `<x>` | The value for which the tangent is to be calculated |
+
+## Return Value
+
+Returns the tangent of x.
+
+## Example
+
+```sql
+select tan(0),tan(1),tan(-1);
 ```
 
-### keywords
-	TAN
+```text
++------------------------+------------------------+-------------------------+
+| tan(cast(0 as DOUBLE)) | tan(cast(1 as DOUBLE)) | tan(cast(-1 as DOUBLE)) |
++------------------------+------------------------+-------------------------+
+|                      0 |     1.5574077246549023 |     -1.5574077246549023 |
++------------------------+------------------------+-------------------------+
+```

docs/sql-manual/sql-functions/scalar-functions/numeric-functions/tanh.md

@@ -22,31 +22,36 @@ specific language governing permissions and limitations
 under the License.
 -->
 
-## tanh
+## Description
 
-### description
-#### Syntax
+Returns the hyperbolic tangent of x.
 
-`DOUBLE tanh(DOUBLE x)`
-Returns the hyperbolic tangent of `x`, tanh(x) = sinh(x) / cosh(x).
-
-### example
+## Syntax
 
+```sql
+TANH(<x>)
 ```
-mysql> select tanh(0);
-+---------+
-| tanh(0) |
-+---------+
-|       0 |
-+---------+
-
-mysql> select tanh(1);
-+---------------------+
-| tanh(1)             |
-+---------------------+
-| 0.76159415595576485 |
-+---------------------+
+
+## Parameters
+
+| Parameter | Description |
+| -- | -- |
+| `<x>` | The value for which the hyperbolic tangent is to be calculated |
+
+## Return Value
+
+The hyperbolic tangent of parameter x.
+
+## Example
+
+```sql
+select tanh(0),tanh(1);
 ```
 
-### keywords
-	TANH
+```text
++-------------------------+-------------------------+
+| tanh(cast(0 as DOUBLE)) | tanh(cast(1 as DOUBLE)) |
++-------------------------+-------------------------+
+|                       0 |      0.7615941559557649 |
++-------------------------+-------------------------+
+```

docs/sql-manual/sql-functions/scalar-functions/numeric-functions/truncate.md

@@ -22,46 +22,58 @@ specific language governing permissions and limitations
 under the License.
 -->
 
-## truncate
+## Description
 
-### description
-#### Syntax
-`DOUBLE truncate(DOUBLE x, INT d)`  
+Perform numerical truncation on x to the number of decimal places d
 
-Numerically truncate `x` according to the number of decimal places `d`.  
+## Syntax
 
-The rules are as follows:  
+```sql
+TRUNCATE(<x>, <d>)
+```
+
+## Parameters
+
+| Parameter | Description |
+| -- | -- |
+| `<x>` | The value that needs to be numerically truncated |
+| `<d>` | The number of decimal places to retain |
+
+## Return Value
+
+Perform numerical truncation on x to the number of decimal places d. Truncation rules:
+
+If d is a literal:
+
+- When d > 0: Keep d decimal places of x.
+- When d = 0: Remove the decimal part of x and retain only the integer part.
+- When d < 0: Remove the decimal part of x and replace the integer part with the number of digits specified by d, using the digit 0.
 
-If `d` is literal:  
-When `d > 0`: keep `d` decimal places of `x`  
-When `d = 0`: remove the fractional part of `x` and keep only the integer part  
-When `d < 0`: Remove the fractional part of `x`, and replace the integer part with the number `0` according to the number of digits specified by `d`  
+If d is a column, and the first argument is of type Decimal, then the resulting Decimal will have the same number of decimal places as the input Decimal
 
-Else if `d` is a column, and `x` has Decimal type, scale of result Decimal will always be same with input Decimal.
+## Example
 
-### example
+ d is a litera
 
+```sql
+select truncate(124.3867, 2),truncate(124.3867, 0),truncate(124.3867, -2);
 ```
-mysql> select truncate(124.3867, 2);
-+-----------------------+
-| truncate(124.3867, 2) |
-+-----------------------+
-|                124.38 |
-+-----------------------+
-mysql> select truncate(124.3867, 0);
-+-----------------------+
-| truncate(124.3867, 0) |
-+-----------------------+
-|                   124 |
-+-----------------------+
-mysql> select truncate(-124.3867, -2);
-+-------------------------+
-| truncate(-124.3867, -2) |
-+-------------------------+
-|                    -100 |
-+-------------------------+
-mysql> select cast("123.123456" as Decimal(9,6)), number, truncate(cast ("123.123456" as Decimal(9,6)), number) from numbers("number"="5");
---------------
+
+```text
++-----------------------+-----------------------+------------------------+
+| truncate(124.3867, 2) | truncate(124.3867, 0) | truncate(124.3867, -2) |
++-----------------------+-----------------------+------------------------+
+|                124.38 |                   124 |                    100 |
++-----------------------+-----------------------+------------------------+
+```
+
+ d is a column
+
+```sql
+select cast("123.123456" as Decimal(9,6)), number, truncate(cast ("123.123456" as Decimal(9,6)), number) from numbers("number"="5");
+```
+
+```text
 +---------------------------------------+--------+----------------------------------------------------------------------+
 | cast('123.123456' as DECIMALV3(9, 6)) | number | truncate(cast('123.123456' as DECIMALV3(9, 6)), cast(number as INT)) |
 +---------------------------------------+--------+----------------------------------------------------------------------+
@@ -72,6 +84,3 @@ mysql> select cast("123.123456" as Decimal(9,6)), number, truncate(cast ("123.12
 |                            123.123456 |      4 |                                                           123.123400 |
 +---------------------------------------+--------+----------------------------------------------------------------------+
 ```
-
-### keywords
-	TRUNCATE

docs/sql-manual/sql-functions/scalar-functions/numeric-functions/uuid_numeric.md

@@ -1,6 +1,6 @@
 ---
 {
-    "title": "uuid_numeric",
+    "title": "UUID_NUMERIC",
     "language": "en"
 }
 ---
@@ -24,28 +24,30 @@ specific language governing permissions and limitations
 under the License.
 -->
 
-## uuid_numeric
-### description
-#### Syntax
+## Description
 
-`LARGEINT uuid_numeric()`
+Return a LARGEINT type uuid
 
-Return a uuid in type `LARGEINT`. 
+## Syntax
 
-Note that `LARGEINT` has type Int128, so we could get a negative number from `uuid_numeric()`.
+```sql
+UUID_NUMERIC()
+```
+
+## Return Value
 
-### example
+Return a LARGEINT type uuid. Note that LARGEINT is an Int128, so uuid_numeric() may produce negative values
 
+## Example
+
+```sql
+select uuid_numeric()
 ```
 
-mysql> select uuid_numeric();
+```text
 +----------------------------------------+
 | uuid_numeric()                         |
 +----------------------------------------+
 | 82218484683747862468445277894131281464 |
 +----------------------------------------+
 ```
-
-### keywords
-
-    UUID UUID-NUMERIC