---
url: /v6.2/en-us/connecting-selectdb.md
---
# Connect to SelectDB

### Connection Steps

Please follow the steps below to connect to the `SelectDB` data source.

1. Click "New Data Connection" in the upper right corner of the data connection page.
   ![](/images/data-connection/connection-001.png)

2. Select the `SelectDB` data source from the data source types.
   ![](/images/data-connection/connecting-selectdb-001.png)

3. Fill in the required parameters for the data source connection as prompted.
   ![](/images/data-connection/connecting-selectdb-002.png)

   **Connection Configuration Information Description**

   | Field                                 | Description                                                                                                              |
   | --------------------------------------| ------------------------------------------------------------------------------------------------------------------------ |
   | Name                                  | The name of the connection. Required and unique within the user.                                                        |
   | Host Address                          | The address of the database. If the URL field is filled in, the URL will take precedence.                               |
   | Port                                  | The port of the database. If the URL field is filled in, the URL will take precedence.                                  |
   | Username                              | The username for the database.                                                                                          |
   | Password                              | The password for the database.                                                                                          |
   | Database                              | The name of the database.                                                                                               |
   | Max Connections                       | The maximum number of connections in the connection pool.                                                               |
   | Encoding                              | The encoding setting for the database connection.                                                                       |
   | Prefer using database comment as dataset title | Choose whether to display the table name or the table comment as the title.                                             |
   | URL                                   | The JDBC URL of the database.                                                                                           |
   | FE Http Port                          | FE Http Port is the port used for writing data via stream load. If provided, write performance will be better; otherwise, insert is used. Since stream load will redirect (302) to the BE port, HENGSHI services must also be able to access the BE port for this feature to work properly. |
   | Hierarchical loading of schema and tables | Default is Off. When enabled, schemas and tables are loaded hierarchically; only schemas are loaded during connection, and you need to click the schema to load the tables under it. |
   | Query Timeout (seconds)               | Default is 600. For large data volumes, you can appropriately increase the timeout.                                     |
   | Allow Write Operations                | Indicates that this connection can be selected as an output connection in [Data Integration](pipeline.md) and [Batch Sync](batch-sync.md). You must have write permissions to the database and pass verification before configuring this parameter. |
   | Support uploading files to specified path | Indicates the database name where tables generated when creating a local file dataset will be stored. You must have write permissions to the database and pass verification before configuring this parameter. |
   | Show only tables under specified database/schema | When this option is selected and the database field is not empty, only tables under the specified db will be displayed.  |

4. After filling in the parameters, click the `Validate` button to get the validation result (this checks the connectivity between HENGSHI SENSE and the configured data connection; you cannot add the connection if validation fails).

5. After validation passes, `Allow Write Operations` and `Support uploading files to specified path` will be enabled and can be optionally turned on.

6. Click `Execute Preset Code` to pop up the preset code for this data source, then click the execute button.

7. Click the `Add` button to add the `SelectDB` connection.

> \[!CAUTION] Please note
>
> 1. Items marked with \* are required fields; other items are optional.
> 2. You must execute the preset code when connecting to the data source. Failure to do so may result in certain functions being unavailable during data analysis.