update data types

docs-2.0/3.ngql-guide/3.data-types/4.date-and-time.md

@@ -16,6 +16,10 @@ This topic will describe the `DATE`, `TIME`, `DATETIME`, `TIMESTAMP`, and `DURAT
 
 - `date()`, `time()`, and `datetime()` all accept the property name to return a specific property value of itself. For example, `date().month` returns the current month, while `time("02:59:40").minute` returns the minutes of the importing time.
 
+- For time operations it is recommended to use `duration()` to calculate the offset of the moment. Addition and subtraction of `date()` and `date()`, `timestamp()` and `timestamp()` are also supported.
+
+- When setting the year of the time as a negative number, you need to use Map type data.
+
 ## OpenCypher Compatibility
 
 In nGQL:
@@ -32,7 +36,31 @@ In nGQL:
 
 The `DATE` type is used for values with a date part but no time part. Nebula Graph retrieves and displays `DATE` values in the `YYYY-MM-DD` format. The supported range is `-32768-01-01` to `32767-12-31`.
 
-The properties of `date()` include `year`, `month`, and `day`.
+The properties of `date()` include `year`, `month`, and `day`. `date()` supports the input of `YYYYY`, `YYYYY-MM` or `YYYYY-MM-DD`, and defaults to `01` for an untyped month or day.
+
+```ngql
+nebula> RETURN DATE({year:-123, month:12, day:3});
++------------------------------------+
+| date({year:-(123),month:12,day:3}) |
++------------------------------------+
+| -123-12-03                         |
++------------------------------------+
+
+nebula> RETURN DATE("23333");
++---------------+
+| date("23333") |
++---------------+
+| 23333-01-01   |
++---------------+
+
+nebula> RETURN DATE("2023-12-12") - DATE("2023-12-11");
++-----------------------------------------+
+| (date("2023-12-12")-date("2023-12-11")) |
++-----------------------------------------+
+| 1                                       |
++-----------------------------------------+
+```
+
 
 ## TIME
 

docs-2.0/3.ngql-guide/5.operators/1.comparison.md

@@ -4,19 +4,12 @@ NebulaGraph supports the following comparison operators.
 
 | Name           | Description                      |
 | :----          | :----:                           |
-| `=`            | Assigns a value                  |
-| `+`            | Addition operator                |
-| `-`            | Minus operator                   |
-| `*`            | Multiplication operator          |
-| `/`            | Division operator                |
 | `==`           | Equal operator                   |
 | `!=`, `<>`     | Not equal operator               |
 | `>`            | Greater than operator            |
 | `>=`           | Greater than or equal operator   |
 | `<`            | Less than operator               |
 | `<=`           | Less than or equal operator      |
-| `%`            | Modulo operator                  |
-| `-`            | Changes the sign of the argument |
 | `IS NULL`      | NULL check                       |
 | `IS NOT NULL`  | Not NULL check                   |
 | `IS EMPTY`     | EMPTY check                      |

docs-2.0/3.ngql-guide/5.operators/10.arithmetic.md

@@ -0,0 +1,37 @@
+# Arithmetic operators
+
+NebulaGraph supports the following arithmetic operators.
+
+| Name           | Description                      |
+| :----          | :----:                           |
+| `+`            | Addition operator                |
+| `-`            | Minus operator                   |
+| `*`            | Multiplication operator          |
+| `/`            | Division operator                |
+| `%`            | Modulo operator                  |
+| `-`            | Changes the sign of the argument |
+
+## Examples
+
+```ngql
+nebula> RETURN 1+2 AS result;
++--------+
+| result |
++--------+
+| 3      |
++--------+
+
+nebula> RETURN -10+5 AS result;
++--------+
+| result |
++--------+
+| -5     |
++--------+
+
+nebula> RETURN (3*8)%5 AS result;
++--------+
+| result |
++--------+
+| 4      |
++--------+
+```

mkdocs.yml

@@ -337,6 +337,7 @@ nav:
           - Set: 3.ngql-guide/5.operators/6.set.md
           - String: 3.ngql-guide/5.operators/7.string.md
           - List: 3.ngql-guide/5.operators/8.list.md
+          - Arithmetic: 3.ngql-guide/5.operators/10.arithmetic.md
           - Precedence: 3.ngql-guide/5.operators/9.precedence.md
 
       - Functions and expressions: