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

# Databases

Alumio supports direct database connectivity for integrations that read from or write to relational databases. A Database Client stores the connection details needed to communicate with an external database and can be reused across multiple integrations.

Navigate to **Connections** → **Database Clients** to create and manage database connections.

### What Database Clients can do

* Connect directly to a relational database as a source or destination in an integration.
* Read data from a database via an Incoming configuration using the Database subscriber.
* Write data to a database via an Outgoing configuration using the Database Batch Publisher.
* Execute queries inline during data processing using the Database Transformer.

### Filtering Database Clients

The overview page lists all Database Clients in your environment. Filters are available for Name, Created at, Updated at, and Labels. Use **+ Add Filter** for additional conditions. Click any column header to sort.

### Creating a Database Client

A Database Client is configured by selecting a prototype that determines which connection fields are available. The following database types are supported:

| Name                                                     | Description                                          |
| -------------------------------------------------------- | ---------------------------------------------------- |
| [IBM DB2](/references/database-connection/ibm-db2)       | Database connection for an IBM DB2 server            |
| [MSSQL](/references/database-connection/mssql-v2)        | Database connection for Microsoft SQL Server (MSSQL) |
| [MySQL](/references/database-connection/mysql)           | Database connection for MySQL                        |
| [Oracle](/references/database-connection/oci-v2)         | Database connection for Oracle                       |
| [PostgreSQL](/references/database-connection/postgresql) | Database connection for PostgreSQL                   |

Each prototype exposes the connection fields relevant to that database type: server host, port, database name, credentials, and database-specific options such as character set, encryption, and connection timeout.