# Examples
By default, all examples in this directory require a postgres server, which you can run using `docker-compose.dev.yml` in the `examples/web` directory.
## Simple
This example initializes persistence, gets a connection and runs the query.
```sh
cargo run --example simple --features r2d2_postgres
```
## Transaction
This is extended simple example where we also upgrade existing connection to transaction and run query. Then we close transaction and use connection.
```sh
cargo run --example transaction --features "nightly r2d2_postgres"
```