> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hightouch.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Oracle DB

> Power internal tools, in-app experiences, and more

## Overview

Hightouch lets you pull data stored in your Oracle database and push it to downstream destinations. Most of the setup occurs in the Hightouch UI, but you need access to your Oracle instance for information like your host, port, database name, and credentials.

> [!NOTE]
>
> You may need to allowlist Hightouch's IP addresses to let our systems connect to your warehouse. Reference our [networking docs](https://docs.hightouch.com/security/networking#ip-addresses) to determine which IP addresses you need to allowlist.

## Connection configuration

To get started, go to the [**Sources** overview page](https://app.hightouch.com/sources?from=docs) and click the **Add source** button. Select **Oracle DB** and follow the steps below.

### Choose connection type

Hightouch can connect directly to Oracle over the public internet or via an SSH tunnel. Since data is encrypted in transit via TLS, a direct connection is suitable for most use cases. You may need to set up a tunnel if your Oracle instance is on a private network or virtual private cloud (VPC).

![Direct connection vs. SSH tunnel](https://mintcdn.com/hightouch-3c037897/L_vQfA0JQEpeGUUo/images/get-started/connection-types-comparison.png?fit=max\&auto=format\&n=L_vQfA0JQEpeGUUo\&q=85\&s=2300535707894b1f08608939cac812b2)

Hightouch supports both standard and reverse SSH tunnels. To learn more about SSH tunneling, refer to Hightouch's [tunneling documentation](https://docs.hightouch.com/security/ssh-tunneling.md).

### Configure your source

Enter the following required fields into Hightouch:

* **Host**: The hostname or IP address of your Oracle server.
* **Port**: The port number of your Oracle server. The default port number is 1521, but yours may be different.
* **Database**: This specifies the database to use when Hightouch executes queries in Oracle DB. This is different than the host, but your host address might contain your database name.
* **Username**: The user that has access through Hightouch to the database and tables you want to pull from. It's best to [create a new user](https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/CREATE-USER.html) specifically for Hightouch access. *Do not use the root user.*
* **Password**: The password for the specified user.

### Choose your sync engine

For optimal performance, Hightouch [tracks incremental changes](https://docs.hightouch.com/getting-started/concepts.md#change-data-capture-cdc)
in your data model—such as added, changed, or removed rows—and only syncs those records.
You can choose between two different sync engines for this work.

The **Basic engine** requires read-only access to Oracle. Hightouch executes a query in your database, reads all query results, and then determines incremental changes using Hightouch's infrastructure. This engine is easier to set up since it requires read—not write—access to Oracle.

## Test your connection

When setting up a source for the first time, Hightouch validates the following:

* Network connectivity
* Oracle credentials
* Permission to list schemas and tables
* Permission to write to `hightouch_planner` schema
* Permission to write to `hightouch_audit` schema

All configurations must pass the first three, while those with the Lightning engine must pass all of them.

Some sources may initially fail connection tests due to timeouts. Once a connection is established, subsequent API requests should happen more quickly, so it's best to retry tests if they first fail. You can do this by clicking **Test again**.

If you've retried the tests and verified your credentials are correct but the tests are still failing, don't hesitate to [reach out to our Customer Success team](#pylon-chat).

## Create models

Once your source configuration has passed the necessary validation, your source setup is complete. Next, you can set up [models](https://docs.hightouch.com/getting-started/concepts.md#models) to define which data you want to pull from Oracle.

The Oracle source supports these modeling methods:

* writing a query in [the SQL editor](https://docs.hightouch.com/models/sql-editor.md)
* using the visual [table selector](https://docs.hightouch.com/models/table-selector.md)
* leveraging existing [dbt models](https://docs.hightouch.com/extensions/dbt-models.md)

## Tips and troubleshooting

If you run into an issue this page doesn't cover, [contact support](#pylon-chat).

### Compatible versions

The supported Oracle DB version is `19c`. Other versions aren't officially supported but may work regardless.

### Unsupported data types

Hightouch does not support `INTERVAL` types for Oracle.