# Microsoft SQL Server
Microsoft SQL Server is a relational database management system developed by Microsoft.

omniload supports Microsoft SQL Server as both a source and destination.

## Installation

To use Microsoft SQL Server with omniload, you need to install the `pyodbc` add-on as well. You can do this by running:

```bash
pip install omniload[odbc]
```

## URI format
The URI format for Microsoft SQL Server is as follows:

```text
mssql://user:password@host:port/dbname?driver=ODBC+Driver+18+for+SQL+Server&TrustServerCertificate=yes
```

URI parameters:
- `user`: the username to connect to the SQL Server instance
- `password`: the password to connect to the SQL Server instance
- `host`: the hostname of the SQL Server instance
- `port`: the port of the SQL Server instance
- `dbname`: the name of the database to connect to
- `driver`: the ODBC driver to use to connect to the SQL Server instance
- `TrustServerCertificate`: whether to trust the server certificate

The same URI structure can be used both for sources and destinations. You can read more about SQLAlchemy's SQL Server dialect [here](https://docs.sqlalchemy.org/en/20/core/engines.html#microsoft-sql-server).

## Tips & Tricks

If you're using Azure SQL Server, you can use `az cli` to generate access tokens to connect to SQL server. 

Set the password to your token and the `Authentication` parameter to `ActiveDirectoryAccessToken`
::: code-group

```sh [token-auth-example.sh]
USER=$(az account show --query user.name -o tsv)
TOKEN=$(az account get-access-token --resource https://database.windows.net/ --query accessToken -o tsv)
omniload ingest \
    --source-uri "mssql://$USER:$TOKEN@<server>.database.windows.net/<database>?Authentication=ActiveDirectoryAccessToken" \
    --source-table "dbo.example" \
    --dest-uri "duckdb:///example.db" \
    --dest-table "dbo.example" \
```
:::