/// tip

👉 👑 ⏸ 👈 👆 🔜 ✔️ 🔀 🚥 👆 💚 ⚙️ 🎏 💽.

///

### ✍ 🇸🇲 `engine`

🥇 🔁 ✍ 🇸🇲 "🚒".

👥 🔜 ⏪ ⚙️ 👉 `engine` 🎏 🥉.

```Python hl_lines="8-10"
{!../../docs_src/sql_databases/sql_app/database.py!}
```

#### 🗒

❌:

```Python
connect_args={"check_same_thread": False}
```

...💪 🕴 `SQLite`. ⚫️ 🚫 💪 🎏 💽.

...并根据您的数据库数据和相关凭据（也适用于 MySQL、MariaDB 或任何其他）对其进行调整。

/// tip

如果您想使用不同的数据库，这是就是您必须修改的地方。

///

### 创建 SQLAlchemy 引擎

第一步，创建一个 SQLAlchemy的“引擎”。

我们稍后会将这个`engine`在其他地方使用。

```Python hl_lines="8-10"
{!../../docs_src/sql_databases/sql_app/database.py!}
```

#### 注意

参数:

```Python
connect_args={"check_same_thread": False}
```

...仅用于`SQLite`，在其他数据库不需要它。

/// info | "技术细节"

- sigs.k8s.io/json: c049b76

### Changed
- cloud.google.com/go/bigquery: v1.4.0 → v1.8.0
- cloud.google.com/go/storage: v1.6.0 → v1.10.0
- cloud.google.com/go: v0.54.0 → v0.81.0
- github.com/GoogleCloudPlatform/k8s-cloud-provider: [7901bc8 → ea6160c](https://github.com/GoogleCloudPlatform/k8s-cloud-provider/compare/7901bc8...ea6160c)

- golang.org/x/net: a5a99cb → 37e1c6a
- k8s.io/system-validators: v1.4.0 → v1.5.0
- k8s.io/utils: da69540 → 4b05e18
- sigs.k8s.io/apiserver-network-proxy/konnectivity-client: v0.0.20 → v0.0.21
- sigs.k8s.io/kustomize/api: v0.8.10 → v0.8.11
- sigs.k8s.io/kustomize/cmd/config: v0.9.12 → v0.9.13
- sigs.k8s.io/kustomize/kustomize/v4: v4.1.3 → v4.2.0
- sigs.k8s.io/kustomize/kyaml: v0.10.20 → v0.11.0

- go.opentelemetry.io/contrib/propagators: v0.20.0
- google.golang.org/grpc/cmd/protoc-gen-go-grpc: v1.1.0

### Changed
- bitbucket.org/bertimus9/systemstat: 0eeff89 → v0.5.0
- cloud.google.com/go: v0.81.0 → v0.97.0
- github.com/Azure/go-autorest/autorest/adal: [v0.9.13 → v0.9.20](https://github.com/Azure/go-autorest/autorest/adal/compare/v0.9.13...v0.9.20)

        `TF_ENABLE_ONEDNN_OPTS=1`.
    *   We do not recommend using them in GPU systems, as they have not been
        sufficiently tested with GPUs yet.
*   TensorFlow pip packages are now built with CUDA11.2 and cuDNN 8.1.0

## Breaking Changes

*   The `TF_CPP_MIN_VLOG_LEVEL` environment variable has been renamed to
    `TF_CPP_MAX_VLOG_LEVEL` which correctly describes its effect.

## Bug Fixes and Other Changes

## 0.46.0

* Fix typos and tweak configs. PR [#837](https://github.com/tiangolo/fastapi/pull/837).
* Add link to Chinese article in [External Links](https://fastapi.tiangolo.com/external-links/). PR [810](https://github.com/tiangolo/fastapi/pull/810) by [@wxq0309](https://github.com/wxq0309).
* Implement `OAuth2AuthorizationCodeBearer` class. PR [#797](https://github.com/tiangolo/fastapi/pull/797) by [@kuwv](https://github.com/kuwv).