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# Sample Data

This section introduces a simple time-series data application scenario, along with the modeling and sample data for this scenario. All example SQL statements in the IoTDB Table Model User Guide can be executed using this modeling and sample data.

## 1. Data Structure

The structures of `table1` and `table2` are as follows:
![](/img/sample-dataset-en-01.png)

## 2. Import Statements

Below are the SQL statements to create the above table structures and insert data. You can download the complete SQL script ([sample-data.sql](/img/sample-data.sql)) to execute these statements in the CLI to import the data into IoTDB.

```SQL
-- Create a table with table names that are close to business semantics. Here, we use table1 instead
-- The time column does not need to be manually specified, IoTDB will automatically create it
-- The unit of TTL is ms, so 1 year is 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);
```

Note: If your terminal does not support multi-line paste (e.g., Windows CMD), please reformat the SQL statement into a single line before execution.