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

Performs an equality join on two `DynamicFrames`.

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

We recommend that you use the [`DynamicFrame.join()`](aws-glue-api-crawler-pyspark-extensions-dynamic-frame.md#aws-glue-api-crawler-pyspark-extensions-dynamic-frame-join) method to join `DynamicFrames`. To view a code example, see [Example: Use join to combine `DynamicFrames`](aws-glue-api-crawler-pyspark-extensions-dynamic-frame.md#pyspark-join-example).

## Methods
<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)
+ [Describe](#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>

Performs an equality join on two `DynamicFrames`.
+ `frame1` – The first `DynamicFrame` to join (required).
+ `frame2` – The second `DynamicFrame` to join (required).
+ `keys1` – The keys to join on for the first frame (required).
+ `keys2` – The keys to join on for the second frame (required).
+ `transformation_ctx` – A unique string that is used to identify state information (optional).

Returns a new `DynamicFrame` that is created by joining the two `DynamicFrames`.

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

Inherited from `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>

Inherited from `GlueTransform` [name](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>

Inherited from `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>

Inherited from `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>

Inherited from `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>

Inherited from `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>

Inherited from `GlueTransform` [describe](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describe).