# Join 类
<a name="aws-glue-api-crawler-pyspark-transforms-join"></a>

对两个 `DynamicFrames` 执行等式联接。

## 示例
<a name="pyspark-Join-example"></a>

我们建议您使用 [`DynamicFrame.join()`](aws-glue-api-crawler-pyspark-extensions-dynamic-frame.md#aws-glue-api-crawler-pyspark-extensions-dynamic-frame-join) 方法联接 `DynamicFrames`。要查看代码示例，请参阅 [示例：使用联接来组合 `DynamicFrames`](aws-glue-api-crawler-pyspark-extensions-dynamic-frame.md#pyspark-join-example)。

## 方法
<a name="aws-glue-api-crawler-pyspark-transforms-join-_methods"></a>
+ [\$1\$1call\$1\$1](#aws-glue-api-crawler-pyspark-transforms-join-__call__)
+ [apply](#aws-glue-api-crawler-pyspark-transforms-join-apply)
+ [name](#aws-glue-api-crawler-pyspark-transforms-join-name)
+ [describeArgs](#aws-glue-api-crawler-pyspark-transforms-join-describeArgs)
+ [describeReturn](#aws-glue-api-crawler-pyspark-transforms-join-describeReturn)
+ [describeTransform](#aws-glue-api-crawler-pyspark-transforms-join-describeTransform)
+ [describeErrors](#aws-glue-api-crawler-pyspark-transforms-join-describeErrors)
+ [描述](#aws-glue-api-crawler-pyspark-transforms-join-describe)

## \$1\$1call\$1\$1(frame1, frame2, keys1, keys2, transformation\$1ctx = "")
<a name="aws-glue-api-crawler-pyspark-transforms-join-__call__"></a>

对两个 `DynamicFrames` 执行等式联接。
+ `frame1` – 要联接的第一个 `DynamicFrame` (必需)。
+ `frame2` – 要联接的第二个 `DynamicFrame` (必需)。
+ `keys1` – 第一个帧要联接的键 (必需)。
+ `keys2` – 第二个帧要联接的键 (必需)。
+ `transformation_ctx` – 用于标识状态信息的唯一字符串 (可选)。

返回新的 `DynamicFrame`，其通过联接两个 `DynamicFrames` 创建。

## apply(cls, \$1args, \$1\$1kwargs)
<a name="aws-glue-api-crawler-pyspark-transforms-join-apply"></a>

继承自 `GlueTransform` [apply](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-apply)。

## name(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-join-name"></a>

继承自 `GlueTransform` [名称](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-name)。

## describeArgs(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-join-describeArgs"></a>

继承自 `GlueTransform` [describeArgs](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeArgs)。

## describeReturn(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-join-describeReturn"></a>

继承自 `GlueTransform` [describeReturn](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeReturn)。

## describeTransform(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-join-describeTransform"></a>

继承自 `GlueTransform` [describeTransform](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeTransform)。

## describeErrors(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-join-describeErrors"></a>

继承自 `GlueTransform` [describeErrors](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeErrors)。

## describe(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-join-describe"></a>

继承自 `GlueTransform` [describe](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describe)。