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Merged
CritasWang merged 1 commit into from
Jul 2, 2025
Merged

delete devices only can delete the data related #793

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2 changes: 1 addition & 1 deletion src/UserGuide/Master/Table/Basic-Concept/Delete-Data.md
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Expand Up @@ -96,7 +96,7 @@ DELETE FROM table1 WHERE model_id = 'B'

## 2. Device Deletion

When a device is written to IoTDB, its metadata is retained even if data is deleted. To remove both the data and metadata of a device, you can use the `DELETE DEVICES` statement.
The device deletion statement supports deleting all devices and their related data in the table.

### 2.1 Syntax Overview

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2 changes: 1 addition & 1 deletion src/UserGuide/latest-Table/Basic-Concept/Delete-Data.md
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Expand Up @@ -96,7 +96,7 @@ DELETE FROM table1 WHERE model_id = 'B'

## 2. Device Deletion

When a device is written to IoTDB, its metadata is retained even if data is deleted. To remove both the data and metadata of a device, you can use the `DELETE DEVICES` statement.
The device deletion statement supports deleting all devices and their related data in the table.

### 2.1 Syntax Overview

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14 changes: 7 additions & 7 deletions src/zh/UserGuide/Master/Table/Basic-Concept/Delete-Data.md
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Expand Up @@ -21,11 +21,11 @@

# 数据删除

## 1. 数据删除：
## 1. 数据删除

数据删除可以通过 delete 语句来完成，其中可以通过指定标签和时间的过滤条件来删除部分数据。

### 1.1 语法概览：
### 1.1 语法概览

```SQL
DELETE FROM <TABLE_NAME> [WHERE_CLAUSE]?
Expand Down Expand Up @@ -55,7 +55,7 @@ ID_CONDITION:
- 对于时间条件，支持 >、<、=、<=、>= 五种运算符。
- 对于标签条件，目前仅支持 = 运算符。

### 1.2 示例：
### 1.2 示例

可以在[示例数据页面](../Reference/Sample-Data.md)中导入示例数据。可以使用这些数据来测试和执行示例中的SQL语句。

Expand Down Expand Up @@ -92,19 +92,19 @@ DELETE FROM table1
DELETE FROM table1 WHERE model_id = 'B'
```

## 2. 设备删除：
## 2. 设备删除

当一个设备写入后，在 IoTDB 中即保留了其元数据，数据删除语句无法删除设备的元数据，可以使用设备删除语句删除设备的所有数据和元数据。
设备删除语句支持删除表里所有设备及相关数据。

### 2.1 语法概览：
### 2.1 语法概览

```SQL
DELETE DEVICES FROM tableName=qualifiedName (WHERE booleanExpression)?
```

- WHERE 仅支持对标签的等值过滤，条件之间仅可使用 AND 和 OR 运算符连接，不支持时间条件。

### 2.2 示例：
### 2.2 示例

```SQL
DELETE DEVICES FROM table1 WHERE device_id = '101'
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14 changes: 7 additions & 7 deletions src/zh/UserGuide/latest-Table/Basic-Concept/Delete-Data.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,11 +21,11 @@

# 数据删除

## 1. 数据删除：
## 1. 数据删除

数据删除可以通过 delete 语句来完成，其中可以通过指定标签和时间的过滤条件来删除部分数据。

### 1.1 语法概览：
### 1.1 语法概览

```SQL
DELETE FROM <TABLE_NAME> [WHERE_CLAUSE]?
Expand Down Expand Up @@ -55,7 +55,7 @@ ID_CONDITION:
- 对于时间条件，支持 >、<、=、<=、>= 五种运算符。
- 对于标签条件，目前仅支持 = 运算符。

### 1.2 示例：
### 1.2 示例

可以在[示例数据页面](../Reference/Sample-Data.md)中导入示例数据。可以使用这些数据来测试和执行示例中的SQL语句。

Expand Down Expand Up @@ -92,19 +92,19 @@ DELETE FROM table1
DELETE FROM table1 WHERE model_id = 'B'
```

## 2. 设备删除：
## 2. 设备删除

当一个设备写入后，在 IoTDB 中即保留了其元数据，数据删除语句无法删除设备的元数据，可以使用设备删除语句删除设备的所有数据和元数据。
设备删除语句支持删除表里所有设备及相关数据。

### 2.1 语法概览：
### 2.1 语法概览

```SQL
DELETE DEVICES FROM tableName=qualifiedName (WHERE booleanExpression)?
```

- WHERE 仅支持对标签的等值过滤，条件之间仅可使用 AND 和 OR 运算符连接，不支持时间条件。

### 2.2 示例：
### 2.2 示例

```SQL
DELETE DEVICES FROM table1 WHERE device_id = '101'
Expand Down