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User guide for using date and datetime in the Cypher documentation #849

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User guide for using date and datetime in the Cypher documentation #849

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136 changes: 89 additions & 47 deletions docs/zh-CN/source/8.query/1.cypher.md
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Original file line number Diff line number Diff line change
Expand Up @@ -659,6 +659,18 @@ LIMIT toInteger(3 * rand())+ 1
CREATE (n:person {id:2002, name: 'Andres'})
RETURN n
```
- ✓ Return the date and datetime type attributes of the created node.

```
CREATE (n:person{id:1,name:"tom",t1:"2025-02-10",t2:"2025-02-10 02:35:30"})
RETURN n.t1 AS date,n.t2 AS datetime
```
**Example output:**

| date | datetime |
|--------------|-------------------------|
| 2025-02-10 | 2025-02-10 02:35:30 |


- Create relationships
- ✓ Create a relationship between two nodes
Expand Down Expand Up @@ -795,54 +807,56 @@ RETURN n.title AS name

### 3.1.Whole List Of Functions

| 种类 | 功能 | 备注 |
| ---------------------- |------------------| ------------------------- |
| Predicate functions | exists() | |
| | all() | 不支持 |
| | any() | 不支持 |
| | single() | 不支持 |
| | none() | 不支持 |
| Scalar functions | id() | |
| | euid() | |
| | properties() | |
| | head() | |
| | last() | |
| | toBoolean() | |
| | toFloat() | |
| | toInteger() | |
| | toString() | |
| | type() | |
| | startnode() | |
| | endnode() | |
| | size() | |
| | length() | |
| | substring() | |
| | concat() | |
| | label() | OpenCypher扩展方法 |
| Aggregating functions | avg() | |
| | collect() | |
| | count() | |
| | max() | |
| | min() | |
| | percentileCont() | |
| | percentileDisc() | |
| | stDev() | |
| | stDevP() | |
| | variance() | |
| | varianceP() | |
| | sum() | |
| List functions | keys() | |
| 种类 | 功能 | 备注 |
| ---------------------- |------------------|-----------------|
| Predicate functions | exists() | |
| | date() | |
| | datetime() | |
| | all() | 不支持 |
| | any() | 不支持 |
| | single() | 不支持 |
| | none() | 不支持 |
| Scalar functions | id() | |
| | euid() | |
| | properties() | |
| | head() | |
| | last() | |
| | toBoolean() | |
| | toFloat() | |
| | toInteger() | |
| | toString() | |
| | type() | |
| | startnode() | |
| | endnode() | |
| | size() | |
| | length() | |
| | substring() | |
| | concat() | |
| | label() | OpenCypher扩展方法 |
| Aggregating functions | avg() | |
| | collect() | |
| | count() | |
| | max() | |
| | min() | |
| | percentileCont() | |
| | percentileDisc() | |
| | stDev() | |
| | stDevP() | |
| | variance() | |
| | varianceP() | |
| | sum() | |
| List functions | keys() | |
| | labels() | 返回结果有且只有一个label |
| | nodes() | |
| | range() | |
| | subscript() | 不支持 |
| Mathematical functions | abs() | |
| | ceil() | |
| | floor() | |
| | rand() | |
| | round() | |
| | sign() | |
| String functions | / | |
| | nodes() | |
| | range() | |
| | subscript() | 不支持 |
| Mathematical functions | abs() | |
| | ceil() | |
| | floor() | |
| | rand() | |
| | round() | |
| | sign() | |
| String functions | / | |

### 3.2.Predicate functions

Expand All @@ -863,6 +877,34 @@ RETURN n.name, n.born
| ------------ |
| true |

- date()

The date class handles dates (year, month, day) without including time.

```
RETURN date() AS date
```

**Example output:**

| date |
|--------------|
| 2025-02-10 |

- datetime()

The datetime class handles both dates and times, including hours, minutes, and seconds, with precision up to nanoseconds.

```
RETURN datetime() AS datetime
```

**Example output:**

| datetime |
|---------------------------------|
| 2025-02-10 02:35:30.095486000 |

### 3.3.Scalar functions

- id()
Expand Down
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