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get-started fix minors & add upsert #12

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May 9, 2020
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get-started fix minors & add upsert #12

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get-started fix minors & add upsert
Amber1990Zhang May 8, 2020
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update
Amber1990Zhang May 8, 2020
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53 changes: 35 additions & 18 deletions docs/manual-CN/1.overview/2.quick-start/1.get-started.md
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@

- 安装
- 数据建模
- CRUD 操作
- 增删改查
- 批量插入
- 数据导入工具

Expand Down Expand Up @@ -34,13 +34,14 @@
0. 检查集群机器状态：

```ngql
nebula> SHOW HOSTS；
nebula> SHOW HOSTS;
================================================================================================
| Ip | Port | Status | Leader count | Leader distribution | Partition distribution |
================================================================================================
| 192.168.8.210 | 44500 | online | | | |
------------------------------------------------------------------------------------------------
| 192.168.8.211 | 44500 | online | | | |
------------------------------------------------------------------------------------------------
```

状态 `online` 表示**存储服务进程** `storaged` 已经成功连接上**元数据服务进程** `metad`。
Expand All @@ -59,28 +60,30 @@
你可以通过 `SHOW HOSTS` 命令检查机器和 partition 分布情况：

```ngql
nebula> SHOW HOSTS；
nebula> SHOW HOSTS;
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Good Catch.
My bad

================================================================================================
| Ip | Port | Status | Leader count | Leader distribution | Partition distribution |
================================================================================================
| 192.168.8.210 | 44500 | online | 8 | nba: 8 | test: 8 |
------------------------------------------------------------------------------------------------
| 192.168.8.211 | 44500 | online | 2 | nba: 2 | test: 2 |
------------------------------------------------------------------------------------------------
```

若发现机器都已在线 (online)，但 Leader distribution 分布不均(如上)，则可以通过命令 (`BALANCE LEADER`) 来触发 partition 重分布：

```ngql
nebula> BALANCE LEADER；
nebula> BALANCE LEADER;
================================================================================================
| Ip | Port | Status | Leader count | Leader distribution | Partition distribution |
================================================================================================
| 192.168.8.210 | 44500 | online | 5 | nba: 5 | test: 5 |
------------------------------------------------------------------------------------------------
| 192.168.8.211 | 44500 | online | 5 | nba: 5 | test: 5 |
------------------------------------------------------------------------------------------------
```

具体解释可以见[这里](../../2.query-language/4.statement-syntax/1.data-definition-statements/create-space-syntax.md)
具体解释可以见[这里](../../2.query-language/4.statement-syntax/1.data-definition-statements/create-space-syntax.md)。

2. 输入以下语句来指定使用的图空间：

Expand Down Expand Up @@ -136,7 +139,7 @@

5. 现在，您可以查看刚刚创建的标签和边类型。

5.1. 要获取刚创建的标签，请输入以下语句：
5.1 要获取刚创建的标签，请输入以下语句：

```ngql
nebula> SHOW TAGS;
Expand All @@ -154,7 +157,7 @@
------------
```

5.2. 要显示刚创建的边类型，请输入以下语句：
5.2 要显示刚创建的边类型，请输入以下语句：

```ngql
nebula> SHOW EDGES;
Expand All @@ -172,7 +175,7 @@
----------
```

5.3. 要显示 **player** 标签的属性，请输入以下语句：
5.3 要显示 **player** 标签的属性，请输入以下语句：

```ngql
nebula> DESCRIBE TAG player;
Expand All @@ -190,7 +193,7 @@
-------------------
```

5.4. 要获取 **follow** 边类型的属性，请输入以下语句：
5.4 要获取 **follow** 边类型的属性，请输入以下语句：

```ngql
nebula> DESCRIBE EDGE follow;
Expand Down Expand Up @@ -259,7 +262,7 @@ nebula> INSERT EDGE serve(start_year, end_year) VALUES 101 -> 201:(1999, 2018);
**同样的**：如果您想一次批量插入多条同类型的边，可以执行以下语句：

```ngql
INSERT EDGE follow(degree) VALUES 100 -> 101:(95), 100 -> 102:(90), 102 -> 101:(75);
nebula> INSERT EDGE follow(degree) VALUES 100 -> 101:(95), 100 -> 102:(90), 102 -> 101:(75);
```

### 读取数据
Expand Down Expand Up @@ -364,11 +367,23 @@ nebula> FETCH PROP ON follow 100 -> 101;
------------------------------------------------------------
```

<!--
### UPSERT
#### UPSERT

`UPSERT` 用于插入新的顶点或边或更新现有的顶点或边。如果顶点或边不存在，则会新建该顶点或边。`UPSERT` 是 `INSERT` 和 `UPDATE` 的组合。

例如：

TODO
-->
```ngql
nebula> INSERT VERTEX player(name, age) VALUES 111:("Ben Simmons", 22); -- 插入一个新点。
nebula> UPSERT VERTEX 111 SET player.name = "Dwight Howard", player.age = $^.player.age + 11 WHEN $^.player.name == "Ben Simmons" && $^.player.age > 20 YIELD $^.player.name AS Name, $^.player.age AS Age; -- 对该点进行 UPSERT 操作。
=======================
| Name | Age |
=======================
| Dwight Howard | 33 |
-----------------------
```
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详情查看 [UPSERT 文档](../../2.query-language/4.statement-syntax/2.data-query-and-manipulation-statements/upsert-syntax.md)。

### 删除数据

Expand Down Expand Up @@ -482,9 +497,11 @@ nebula> GO FROM 100 OVER follow WHERE $$.player.age >= 35 \

**这里**：

- `$^` 表示边的起始点。
- `|` 表示管道。
- `$-` 表示输入流。上一个查询的输出`(id)`作为下一个查询的输入`($-.id)`。
`$^` 表示边的起始点。

`|` 表示管道。

`$-` 表示输入流。上一个查询的输出`(id)`作为下一个查询的输入`($-.id)`。

2. 使用`自定义的变量`来组合两个查询语句

Expand Down Expand Up @@ -539,7 +556,7 @@ vesoft/nebula-console:nightly --addr=<127.0.0.1> --port=<3699>

### 批量导入

如果您要插入数百万条记录，建议使用 [csv 导入工具](../../3.build-develop-and-administration/5.storage-service-administration/data-import/import-csv-file.md) 和 [Spark 导入工具](../../3.build-develop-and-administration/5.storage-service-administration/data-import/spark-writer.md)
如果您要插入数百万条记录，建议使用 [csv 导入工具](../../3.build-develop-and-administration/5.storage-service-administration/data-import/import-csv-file.md) 和 [Spark 导入工具](../../3.build-develop-and-administration/5.storage-service-administration/data-import/spark-writer.md)。

### 最后

Expand Down