Calculating a % based on multiple dates

jvsering
jvsering Member
in Beast Mode

I would like to create a beast mode that calculates the % of the way we are into a campaign. In Excel, I would calculate this as =(TODAY()-'Start Date') / ('End Date' - 'Start Date')

Here's what I have so far (I want this to return a %):

(SUM(IFNULL(CURDATE(), 0) - IFNULL(`Start Date`, 0)) / NULLIF(SUM(IFNULL(`End Date`, 0) - IFNULL(`Start Date`, 0)), 0))

The formula validates fine but I get an error when I add it to a card.

Best Answers

  • marcel_luthi
    marcel_luthi Coach
    edited January 12 Answer ✓

    A couple of questions:

    1. What is the answer you would expect to get when a Campaign has no start date?
    2. What should be the answer when a campaign has no end date?

    In your dataset, what is the level of granularity you have? If this is a campaign level dataset, then a formula to cover the out of bond scenarios (no start date, not yet started, no end date and already ended) first, and then operate at the row level is likely best:

    CASE
WHEN `StartDate` IS NULL THEN 0
WHEN `StartDate` > CURDATE() THEN 0
WHEN `EndDate` IS NULL THEN 0
WHEN `EndDate` < CURDATE() THEN 1
ELSE ROUND(((UNIX_TIMESTAMP(CURDATE())-UNIX_TIMESTAMP(`StartDate`))/86400)-0.5,0)/ROUND(((UNIX_TIMESTAMP(`EndDate`)-UNIX_TIMESTAMP(`StartDate`))/86400)-0.5,0) 
END

    You could try with DATEDIFF but that one is known to behave oddly sometimes, so the UNIX diff is often preferred and more reliable, feel free to try both.

  • ST_-Superman-_
    ST_-Superman-_ Coach
    Answer ✓

    You could add a case statement

    Case when curdate() > End Date then 1 else … end

    where the … is your formula from above


    “There is a superhero in all of us, we just need the courage to put on the cape.” -Superman

Answers

  • ThomasPetroski
    ThomasPetroski Member

    SUM(IFNULL(DATEDIFF(CURDATE(), 'Start Date'), 0)) / NULLIF(SUM(IFNULL(DATEDIFF('End Date', 'Start Date'), 0)), 0)

  • marcel_luthi
    marcel_luthi Coach
    edited January 12 Answer ✓

    A couple of questions:

    1. What is the answer you would expect to get when a Campaign has no start date?
    2. What should be the answer when a campaign has no end date?

    In your dataset, what is the level of granularity you have? If this is a campaign level dataset, then a formula to cover the out of bond scenarios (no start date, not yet started, no end date and already ended) first, and then operate at the row level is likely best:

    CASE
WHEN `StartDate` IS NULL THEN 0
WHEN `StartDate` > CURDATE() THEN 0
WHEN `EndDate` IS NULL THEN 0
WHEN `EndDate` < CURDATE() THEN 1
ELSE ROUND(((UNIX_TIMESTAMP(CURDATE())-UNIX_TIMESTAMP(`StartDate`))/86400)-0.5,0)/ROUND(((UNIX_TIMESTAMP(`EndDate`)-UNIX_TIMESTAMP(`StartDate`))/86400)-0.5,0) 
END

    You could try with DATEDIFF but that one is known to behave oddly sometimes, so the UNIX diff is often preferred and more reliable, feel free to try both.

  • jvsering
    jvsering Member

    Thanks for all the replies. I ended up going with:

    DATEDIFF(CURDATE(), Start Date) / DATEDIFF(End Date, Start Date)

    I would like to cap the results at 100%, can I get help with that?

  • ST_-Superman-_
    ST_-Superman-_ Coach
    Answer ✓

    You could add a case statement

    Case when curdate() > End Date then 1 else … end

    where the … is your formula from above


    “There is a superhero in all of us, we just need the courage to put on the cape.” -Superman

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