Mmmh, I created I small fact table in Excel and “linked” it to powerpivot, then loaded my usual dates table and created a relationship via date.
We see that PARALLELPERIOD still returns the entire years values. This blog posts looks at the difference between the two. SAMEPERIODLASTYEAR returns a single column table of dates values. So you will see a difference between Parallelperiod and DATEADD -1 year for 2010.

Returns a table that contains a column of dates shifted one year back in time from the dates in the specified dates column, in the current context. Invoice Date is linked to DimDate[DimDate]. All about Power BI, Modelling, DAX and Microsoft BI.

If you now go back one year it will calculate the sum of SalesAmount for 1/1/2003 to 8/31/2003. User Rating: 5 / 5. PARALLELPERIOD returns a table that contains a column of dates that represents a period parallel to the dates in the specified dates column, in the current context, with the dates shifted a number of intervals either forward in time or back in time. If I wanted to get a standard 3 month rolling, I could click on December and assuming I wrote my DAX function using a couple of PARALLELPERIODs …+(…-1, month)+(…-2,month), get the 3 month rolling. We see as expected that the 3 measure all return the same value. This site uses Akismet to reduce spam. Our PARALLELPERIOD function, however, gives us the Total Sales for the year as we selected the PARALLELPERIOD to be one year back. DATEADD function returns date values.

So if I click on December (and there’s only data for December/November/August), it will return the 3 month aggregation for those 3 months b/c they’re the previous 3 months with data. ı have attached a screenshot from my model.

PARALLELPERIOD does exactly what you tell it to do where DATEADD is more depending on the data.

PARALLELPERIOD is looking at the Date from the ‘Calendar Table’.

THE DAX DATEADD function is categorized under the Date&Time functions.

I have sales table with [REVENUE] and [INVOICE DATE]. From the table, we can clearly see what the outcome of PARALLELPERIOD is. We’ll make sure you never miss a thing, The result table includes only dates that exist in the.

@Joshua Hi Joshua, same problem. We can see that DATEADD look at a set of dates have a number of intervals that it looks backwards or forward and goes backwards or forward based on a set interval of a year, quarter or month. Now look at the first and lastdates PARALLELPERIOD uses.
DATEADD returns a table that contains a column of dates, shifted either forward or backwards in time by the specified number of intervals from the dates in the current context. In this blog post, we are going to look at three DAX time intelligent functions. The PARALLELPERIOD function is similar to the DATEADD function except that PARALLELPERIOD always returns full periods at the given granularity level instead of the partial periods that DATEADD returns. PARALLELPERIOD(,,). Fortunately, creating a calculation with DAX is more like creating an Excel formula that uses a built-in function than it is like using a programming language such as VBA or HTML. Note: that SAMEPERIODLASTYEAR looks a bit different than PARALLELPERIOD and DATEADD. Lets look at these two formula’s: They both look very similar right ?

We can best illustrate this by adding months into the mix: What makes these two measures return different results here is that both use a different mechanism to determine the current period. The DATEADD function moves the specified date forward or backward by specified intervals. If the dates in the current context do not form a contiguous interval, the function returns an error. The value for interval can be one of the following, year, quarter or month. I’m trying to create PMDate (Previous Month Date) calculated column for each day in my Date dimension. Is there way way I can write a formula to pull data from the last 3 months that have it? Something to take note of is the behaviour of SAMEPERIODLASTYEAR. In this case the devil is in the details. Yup. I know I don’t have 365 consecutive dates worth of sales.

Where PARALLELPERIOD always goes back one entire year (or whatever parameter you select in the measure), DATEADD will look at the current row selection and go back one year for that selection. He achieves this through sound analysis and understanding of the challenge on hand and matching that with the appropriate process and/or technological change required leading to highly effective and efficient business operations. THE DAX DATEADD function is categorized under the Date&Time functions. I know many of you will say the functions sound very similar and that they have more or less the same functionality. This blog posts looks at the difference between the two. Your email address will not be published.

What we can see here is that these two functions return the corresponding monthly values, but going back one year period.

PowerPivot DAX PARALLELPERIOD vs DATEADD. But what is the difference ? Well it depends on what you want to do.

Ofcourse you will only see the difference if you have data in nov and december for 2009. The values it will calculate for 2009 are from jan to oktober.

The filter context here is PARALLELPERIOD.

But as last year we see 8/31/2004 because this was the last date a sale was done in that year (the year is not finished yet). Any ideas? We will create our PARALLELPERIOD  measure and call it ‘PARALLELPERIOD’. This blog posts looks at the difference between the two. Why ? As you can see the it determines the current year, looks for the first and last day in the year using the date table   and use that to move back one year. Total Sales = CALCULATE(SUM(Sales[Total Sales])). For example, if you have a selection of dates that starts at June 10 and finishes at June 21 of the same year, and you want to shift that selection forward by one month then the PARALLELPERIOD function will return all dates from the next month (July 1 to July 31); however, if DATEADD is used instead, then the result will include only dates from July 10 to July 21. If I try to use DateAdd with Sales(Invoice Date), I get an error because DateAdd can only work with contiguous date selections.

The CALCULATE function requires an Expression and Filter input.

These DAX time intelligent functions are PARALLELPERIOD, DATEADD and SAMEPERIODLASTYEAR.

Posted on August 11, 2011 Author Kasper 9. Let’s view the result of our measure by changing our table to a yearly view. Thus this function will adapt to the way we look at our data as in the table in our example.

SAMEPERIODLASTYEAR is specific to a year interval where a syntax for the DATEADD and PARALLELPERIOD include other intervals such as quarter, month day.

PARALELLPERIOD = CALCULATE([Total Sales], PARALLELPERIOD(‘Calendar’ [Date], -1, MONTH)), DATEADD = CALCULATE([Total Sales], DATEADD(‘Calendar’ [Date], -1, MONTH)). Interval – the interval by which to shift the dates. Whereas  PARALLELPERIOD uses the first and last date in your datetable for the current year to go back one year.

Purpose of DAX DATEADD Function. PARALLELPERIOD really goes back one entire year (based on what you select in the parameter) using the first and last date. If we look at the table on a yearly level, SAMEPERIODLASTYEAR will return the previous years values. Notify me of followup comments via e-mail. What does this mean ? So, with my Sales[Invoice Date] linked to DimDate[Dim Date], exactly why are we getting the same results between ParellelPeriod and DateAdd? Thus it basically removes all filters in the context filters and only returns the year even if you change your table to a monthly view. Your email address will not be published. Now if the last working day in a year is the 30.12, and in the year before it is the 31., then this measure will “overlook” the last day because it only shifts the values from the first to the last date value it finds in the fact table? DATEADD(,,). Syntax . PowerPivot DAX PARALLELPERIOD vs DATEADD Written by Kasper de Jonge on 16 August 2011. However, DAX functions are based on the datetime data types used by Microsoft SQL Server. To do this we are going to start with the CALCULATE function (please see our blog post on the CALCULATE function). Power BI time intelligence analysis is made simple by the Data Bear team through DAX SAMEPERIODLASTYEAR, PARALELLPERIOD and DATEADD functions. To determine previous year DATEADD uses a range between the first date where you have values in the facttable to the last date where you have values in your facttable for the current year on rows, it will this range to go back one year.

What we see from our table is that PARALELLPERIOD still behaves the same, but DATEADD and SAMEPERIODLASTYEAR have changed. Save my name, email, and website in this browser for the next time I comment. This should already give you a good indication of what the function is doing. We will go over the syntax of our two remaining functions and then you look at some examples. If I click on December and there’s no data (but there is for say only November, October, and August), it’ll pull for Nov./Oct./August. Return value . Changing colours using DAX and conditional formatting in Power BI, Data Preparation Part 2 – Pivot vs Unpivot Columns, Data Preparation Part 6 – Star Schema Power BI. DATEADD(,,), More off this less hello salamander lied porpoise much over tightly circa horse taped so innocuously outside crud mightily….

We are going to change PARALLELPERIOD and DATEADD’s interval to Month.

Have you figured it out? We have a sales table from which we would like to create our Total Sales for the corresponding ‘parallel period of previous years.

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