# Database requirements

The table below lists the supported database engines.

| **Database engine**  | **Requirement**                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| -------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| PostgreSQL           | Version: 11 to 15                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| Microsoft SQL server | <p>Version:</p><p>• 2022 (MSSQL Server 16.0); 2019 (MSSQL Server 15.0); 2017 (MSSQL Server 14.0); 2016 (MSSQL Server 13.0); 2014 (MSSQL Server 12.0).</p><p>• With bundled Microsoft JDBC driver.</p><p><strong>Notes</strong>:</p><p>• Express Edition is supported.</p><p>• Windows and SQL Server authentication are both supported.</p>                                                                                                                                      |
| Oracle               | <p>Version: 21C, 19C, XE Editions</p><p><strong>Recommendation</strong>: Use the latest Oracle JDBC driver.</p><p><strong>Notes:</strong></p><p>• The driver ojdbc14.jar is not supported.</p><p>• Only the thin mode is supported, not OCI.</p><p>• Only MAX\_STRING\_SIZE=STANDARD parameter is supported, not EXTENDED.</p><p>• The Oracle JDBC driver versions 12.1.0.1 and 12.1.0.2 have major bugs, and are not recommended for use with SonarQube (see more details).</p> |


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.sonarsource.com/sonarqube-server/10.5/setup-and-upgrade/installation-requirements/database-requirements.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.