Need help to show total of last 18 months for each month for last 12 months
Hi Experts,
I need to display a chart for the total number of patients for the last 18 months for each month for the last 12 months. I need help in figuring out this visualization through beast mode since I do not where to start.
I am new to domo and beast modes and will appreciate you all helping me out here.
Thank you :)
Vy
Answers
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Hi @user012068
What format is your data in? Is it already aggregated on a monthly basis or is it daily?
You'll want to make sure your data is aggregated on a monthly basis and you can then utilize the LAG window function to pull the values for the past 18 months for each month.
LAG(SUM(`patient_count`), 0) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 1) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 2) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 3) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 4) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 5) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 6) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 7) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 8) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 9) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 10) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 11) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 12) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 13) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 14) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 15) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 16) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`)) + LAG(SUM(`patient_count`), 17) OVER (PARTITION BY YEAR(`Date`), MONTH(`Date`) ORDER BY YEAR(`Date`), MONTH(`Date`))
Window functions is a feature switch and you'll need to talk with your CSM to get it enabled. I've done a writeup previously about lag window functions here: Domo IDEAs Conference - Beast Modes - Rolling Averages
Alternatively you could do this in a Magic ETL with a Rank & Window tile to simplify the card.
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If your dataset is showing totals for each day, you can do this in Magic ETL with just a few tiles. It would look something like this:
Use the formula tile to create a year column and month column
Use the group by tile to get totals for each month:
Use the Rank & Window tile create an 18-month total calculation by using the SUM and 18 preceding and sorting by year and month
This should get you what you want.
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