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# 示例数据

本章节主要介绍一个简单的时序数据应用场景以及在此场景下的建模与示例数据，IoTDB 表模型用户手册中所有的示例 SQL 语句都可以在此建模和示例数据下执行。

## 1. 数据结构

table1和table2均为如下表结构：

![](/img/Sample_data01.png)

## 2. 导入语句

以下为构建上述表结构及数据的SQL语句，您可以点此（[sample-data.sql](/img/sample-data.sql)）下载全部SQL并在CLI中执行，从而将数据导入您的IoTDB。

```SQL
-- 创建表，表名可以贴近业务语义，这里我们以 table1 来代替
-- 时间列可以不手动指定，IoTDB 会自动创建
-- TTL 的单位是 ms，所以 1 年是 31536000000 ms
create database database1;
use database1;
CREATE TABLE table1 (
  time TIMESTAMP TIME,
  region STRING TAG,
  plant_id STRING TAG,
  device_id STRING TAG,
  model_id STRING ATTRIBUTE,
  maintenance STRING ATTRIBUTE,
  temperature FLOAT FIELD,
  humidity FLOAT FIELD,
  status Boolean FIELD,
  arrival_time TIMESTAMP FIELD
) WITH (TTL=31536000000);

CREATE TABLE table2 (
  time TIMESTAMP TIME,
  region STRING TAG,
  plant_id STRING TAG,
  device_id STRING TAG,
  model_id STRING ATTRIBUTE,
  maintenance STRING ATTRIBUTE,
  temperature FLOAT FIELD,
  humidity FLOAT FIELD,
  status Boolean FIELD,
  arrival_time TIMESTAMP FIELD
) WITH (TTL=31536000000);


INSERT INTO table1(region, plant_id, device_id, model_id, maintenance, time, temperature, humidity, status, arrival_time) VALUES 
  ('北京', '1001', '100', 'A', '180', '2024-11-26 13:37:00', 90.0, 35.1, true, '2024-11-26 13:37:34'),
  ('北京', '1001', '100', 'A', '180', '2024-11-26 13:38:00', 90.0, 35.1, true, '2024-11-26 13:38:25'),
  ('北京', '1001', '101', 'B', '180', '2024-11-27 16:38:00', NULL, 35.1,  true, '2024-11-27 16:37:01'),
  ('北京', '1001', '101', 'B', '180', '2024-11-27 16:39:00', 85.0, 35.3, NULL, Null),
  ('北京', '1001', '101', 'B', '180', '2024-11-27 16:40:00', 85.0, NULL, NULL, '2024-11-27 16:37:03'),
  ('北京', '1001', '101', 'B', '180', '2024-11-27 16:41:00', 85.0, NULL, NULL, '2024-11-27 16:37:04'),
  ('北京', '1001', '101', 'B', '180', '2024-11-27 16:42:00', NULL, 35.2, false, Null),
  ('北京', '1001', '101', 'B', '180', '2024-11-27 16:43:00', NULL, Null, false, Null),
  ('北京', '1001', '101', 'B', '180', '2024-11-27 16:44:00', NULL, Null, false, '2024-11-27 16:37:08'),
  ('上海', '3001', '100', 'C', '90', '2024-11-28 08:00:00', 85.0, Null, NULL, '2024-11-28 08:00:09'),
  ('上海', '3001', '100', 'C', '90', '2024-11-28 09:00:00', NULL, 40.9, true, NULL),
  ('上海', '3001', '100', 'C', '90', '2024-11-28 10:00:00', 85.0, 35.2, NULL, '2024-11-28 10:00:11'),
  ('上海', '3001', '100', 'C', '90', '2024-11-28 11:00:00', 88.0, 45.1, true, '2024-11-28 11:00:12'),
  ('上海', '3001', '101', 'D', '360', '2024-11-29 10:00:00', 85.0, NULL, NULL, '2024-11-29 10:00:13'),
  ('上海', '3002', '100', 'E', '180', '2024-11-29 11:00:00', NULL, 45.1, true, NULL),
  ('上海', '3002', '100', 'E', '180', '2024-11-29 18:30:00', 90.0, 35.4, true, '2024-11-29 18:30:15'),
  ('上海', '3002', '101', 'F', '360', '2024-11-30 09:30:00', 90.0, 35.2, true, NULL),
  ('上海', '3002', '101', 'F', '360', '2024-11-30 14:30:00', 90.0, 34.8, true, '2024-11-30 14:30:17');
  
 INSERT INTO table2(region, plant_id, device_id, model_id, maintenance, time, temperature, humidity, status, arrival_time) VALUES 
  ('北京', '1001', '100', 'A', '180', '2024-11-26 13:37:00', 90.0, 35.1, true, '2024-11-26 13:37:34'),
  ('北京', '1001', '101', 'B', '180', '2024-11-27 00:00:00', 85.0, 35.1,  true, '2024-11-27 16:37:01'),
  ('上海', '3001', '100', 'C', '90', '2024-11-28 08:00:00', 85.0, 35.2, false, '2024-11-28 08:00:09'),
  ('上海', '3001', '101', 'D', '360', '2024-11-29 00:00:00', 85.0, 35.1, NULL, '2024-11-29 10:00:13'),
  ('上海', '3002', '100', 'E', '180', '2024-11-29 11:00:00', NULL, 45.1, true, NULL),
  ('上海', '3002', '101', 'F', '360', '2024-11-30 00:00:00', 90.0, 35.2, true, NULL);
```

注意：若您使用的终端不支持多行粘贴（例如 Windows CMD），请将 SQL 语句调整为单行格式后再执行。