### Create Database Tables on Startup

We will create the database tables when the application starts.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[32:37] hl[35:37] *}

Here we create the tables on an application startup event.

For production you would probably use a migration script that runs before you start your app. 🤓

/// tip

HSPLandroidx/startup/AppInitializer;-><clinit>()V
HSPLandroidx/startup/AppInitializer;-><init>(Landroid/content/Context;)V
HSPLandroidx/startup/AppInitializer;->doInitialize(Ljava/lang/Class;Ljava/util/Set;)Ljava/lang/Object;
HSPLandroidx/startup/InitializationProvider;-><init>()V
HSPLandroidx/startup/InitializationProvider;->onCreate()Z
HSPLandroidx/tracing/Trace;->isEnabled()Z

```console
$ uvicorn main:app --reload

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary><code>uvicorn main:app --reload</code> komutuyla ilgili...</summary>

@DoNotMock("Create an AbstractIdleService")
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public interface Service {
  /**
   * If the service state is {@link State#NEW}, this initiates service startup and returns
   * immediately. A stopped service may not be restarted.
   *
   * @return this
   * @throws IllegalStateException if the service is not {@link State#NEW}
   * @since 15.0
   */
  @CanIgnoreReturnValue

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [2248755] using WatchFiles
INFO:     Started server process [2248757]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>About the command <code>fastapi dev main.py</code>...</summary>

		file = trimTrace(file)
		// Get the function name
		_, funcName := filepath.Split(runtime.FuncForPC(pc).Name())
		// Skip duplicate traces that start with file name, "<autogenerated>"
		// and also skip traces with function name that starts with "runtime."
		if !strings.HasPrefix(file, "<autogenerated>") &&
			!strings.HasPrefix(funcName, "runtime.") {
			// Form and append a line of stack trace into a

    - [daemonset and configmap](https://docs.projectcalico.org/v3.2/getting-started/kubernetes/installation/hosted/calico.yaml) - search for the `calico-node` Daemonset and its `install-cni` container deployment

```console
$ uvicorn main:app --reload

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>À propos de la commande <code>uvicorn main:app --reload</code> ...</summary>

```console
$ uvicorn main:app --reload

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>關於指令 <code>uvicorn main:app --reload</code>...</summary>

* Soporte para **WebSocket**.
* <abbr title="En español: tareas que se ejecutan en el fondo, sin frenar requests, en el mismo proceso. En ingles: In-process background tasks">Tareas en background</abbr>.
* Eventos de startup y shutdown.
* Cliente de pruebas construido con HTTPX.
* **CORS**, GZip, Static Files, Streaming responses.
* Soporte para **Session and Cookie**.
* Cobertura de pruebas al 100%.
* Base de código 100% anotada con tipos.