public void setDefaultDateColumnName(String defaultDateColumnName) {
        this.defaultDateColumnName = defaultDateColumnName;
    }
<p>
The column name for the default date.
</p>

@param defaultDateColumnName
       The column name for the default date.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/DataAggregation.java