ETL: Calcs based on date ranges
I am using Magic ETL to load data. My data has columns for customer, month, product and revenue. I have created calculated columns in the ETL for the customers start month. I am trying to create a column that calculates the maximum monthly revenue for a customer within the first 3 months of their start date; this is dynamic so every customer has a different start date. I am using this for churn analysis later so want to put it in the ETL instead of in beast mode so that I can use it in other calculations. However, I am having a hard time figuring out how to calculate this as all the dates I see are fixed or relative but used in the entire data set. Any suggestions?
Best Answer
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The SQL transform worked. I also was able to do this in the Magic ETL by creating another data flow and filtering for the range I was looking for and then doing a group by on that range.
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Answers
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Normally when doing something like this, I would use a SQL Transform. Here's what that might look like:
SELECT
a.*,
(SELECT SUM(`Price`) FROM dataset AS b
WHERE b.`Customer` = a.`Customer`
AND b.`Month` >= a.`Start Month`
AND b.`Month` <= DATE_ADD(a.`Start Month`, INTERVAL 2 MONTH)
ORDER BY SUM(`Price`) DESC
LIMIT 1) AS 'Max 3 Month Price'
FROM dataset AS aHopefully that logic will help get you started.
Sincerely,
Valiant
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**Say "Thanks" by clicking the "heart" in the post that helped you.1 -
The SQL transform worked. I also was able to do this in the Magic ETL by creating another data flow and filtering for the range I was looking for and then doing a group by on that range.
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