@raw_parsed = EXTRACT child_id int,
                _reason_sk string,
	_reason_id string,
	_reason_desc string,
	empty string
FROM "wasb://reason@<blob storage account name>/{*}_{child_id}_100.dat"
USING Extractors.Text(delimiter: '|');

@filtered_results = SELECT _reason_sk,
	_reason_id,
	_reason_desc
FROM @raw_parsed
WHERE child_id BETWEEN 1 AND 100;

OUTPUT @filtered_results
TO "/large_multiple/reason.csv"
USING Outputters.Csv(outputHeader: true);