# AggregateOperation
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Specifies the set of parameters needed to perform aggregation in the aggregate transform.

## Contents
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 ** AggFunc **   <a name="Glue-Type-AggregateOperation-AggFunc"></a>
Specifies the aggregation function to apply.  
Possible aggregation functions include: avg countDistinct, count, first, last, kurtosis, max, min, skewness, stddev\$1samp, stddev\$1pop, sum, sumDistinct, var\$1samp, var\$1pop  
Type: String  
Valid Values: `avg | countDistinct | count | first | last | kurtosis | max | min | skewness | stddev_samp | stddev_pop | sum | sumDistinct | var_samp | var_pop`   
Required: Yes

 ** Column **   <a name="Glue-Type-AggregateOperation-Column"></a>
Specifies the column on the data set on which the aggregation function will be applied.  
Type: Array of strings  
Pattern: `([\u0009\u000B\u000C\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF])*`   
Required: Yes

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/glue-2017-03-31/AggregateOperation) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/glue-2017-03-31/AggregateOperation) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/glue-2017-03-31/AggregateOperation)