The Microsoft documentation describes as “query context” the filters applied by the user interface of a pivot table and as “filter context” the filters applied by DAX expressions that you can write in a measure. When a table name is given, returns a table with the same columns and all the rows of the table (including duplicates) with the additional blank row if present. two columns coming from different tables. This time, we use a different formula for our considerations: Sales [GrossMargin] = Sales [SalesAmount] - Sales [TotalCost] Feature Image - % Change ... Then when your calculating other measures you would use the min and max dates as filter context. REMOVEFILTERS can only be used to clear filters but not to return a table. ADDCOLUMNS ( , , [, , [, … ] ] ). The CALCULATE function in DAX measures Removing filters in an expression using CALCULATE It's better if you could upload a pbix file. The filter context is the set of filters applied to the data model before the evaluation of a DAX expression starts. This is how we get the result of 40,052.60 for the same date in 2019. The interaction between the filter arguments of CALCULATE or CALCULATETABLEand the filter context generated by the context transition is a possible source of confusion. All rights are reserved. The companion video introduces the scenario and the general…  Read more, Enclose code in comments with
 to preserve indentation. Contributors: Alberto Ferrari, Marco Russo Understanding Row Context. A filter context is a set of filters over the rows of the data model. DAX Measure - Change filter context (one products value to other products value). which are a central concept which is vital for being able to write effective and powerful DAX!In this series Carmel walks through the main ideas and syntax surrounding the DAX language, and provides examples of using these over a dataset. You can obtain the same effect by applying a filter with CALCULATE or CALCULATETABLE. CALCULATE( expression, table[column] = value ) They are also regular speakers at major international BI conferences, including Microsoft Ignite, Data Insight Summit, PASS Summit, and SQLBits. After removing the filter from any date, I will then work through every single date and look at the … Specifies cross filtering direction to be used in the evaluation of a DAX expression. When a filter context is not empty, it limits the rows that a DAX expression can iterate in a data model. DAX – Data Analysis eXpression Filter x Row Context ALL (  [] [,  [,  [, … ] ] ] ). They can contain filters for any of the fields in our data model. Based on the desired output we will use Dax to change the values that are filtering the columns. If the filter context is empty, a DAX expression can iterate all the rows of the tables in a data model. » Read more. DAX is a collection of functions, operators, and constants that can be used in a formula, or expression, to calculate and return one or more values. Usually, every cell of a report has a different filter context, which can be defined implicitly by the user interface (such as the pivot table in Excel), or explicitly by a DAX expression using CALCULATE or CALCULATETABLE. STARTOFYEAR is a table function so it transitions the currently iterated row of row context created by FILTER (in previous step) into the filter … Thanks to context transition, using a measure in the filter expression it is possible to filter a table based on a dynamic calculation involving other rows and/or tables. The filter context is the set of filters applied to the data model before the evaluation of a DAX expression starts. In addition you can use a column reference to instruct certain functions to perform an action on a column, like in the following measure that counts the number of product names: In this case, Product[ProductName] does not retrieve the value of ProductName for a specific row. Related articles. A filter context does automatically propagate through relationships, according to the cross filter direction of the relationship. When a column name is given, returns a single column table of unique values. How context filter works depends on the relationships between your tables. Mark your calendars and join us for our next Power BI Dev Camp!. In Power Pivot for Excel, the only direction is one-to-many. In Power BI Desktop and in SQL Server Analysis Services Tabular 2016, you can enable bidirectional cross filtering. A visual can be grouped, filtered by other visuals (as slicers) or report filters. When you write an expression in a calculated column, the expression is evaluated for each row of the table, creating a row context for each row. Learn more about FILTERS in the following articles: Displaying filter context in Power BI Tooltips. FILTER can filter rows from a table by using any expression valid in the row context. This post focuses on filter contexts. The relationship is defined by naming, as arguments, the two columns that serve as endpoints. This article shows how you can use the FILTER function to do something similar and explains the differences between the two approaches. Measures – Dynamic Percent Change – Using DAX. For example, this measure is not valid: In order to make it work, you need to aggregate the column, not to refer to its value. Figure 16 – Combination of two filters “Country” and “Color” resulting in “Sales Amount” So, we can understand that a filter context defines which rows are visible in the fact tables. A filter is positioned over tables every time we make a selection in our reports. And of course, they are qualified trainers, with more than 250 classes taught so far. A filter context is a filter that is applied to the report and flow across the relationships. Existing filters on non-related columns are unaffected. The filter context arises from sources such as pivot charts, pivot tables, and slicers. In other words, you reference the column, not its value. You can safely do this because there are two row contexts: the first one introduced by AVERAGEX over Customer and the second one introduced by SUMX over Sales. Get BI news and original content in your inbox every 2 weeks! A row context does not propagate through relationships. 2016-06-10 Mike Carlo Report Data Tips 19. The yellow cell should not be there. Remember that the row context does not propagate automatically through relationships, whereas the filter context does traverse relationships independently from the DAX code. The last measure look like this: =CALCULATE ( [Salg Kiwi];factData [Vare]="Kiwi";factData [Vare]="Pærer") I dont want values for apple (epler). When you use a measure in a pivot table, for example, it produces different results for each cell because the same expression is evaluated over a different subset of the data. For example, consider the following DAX expression that should compute the year over year of Sales Amount considering only the months present in both years. Calculate overrides the current filter context with another. Marco Russo and Alberto Ferrari are the founders of SQLBI, where they regularly publish articles about Microsoft Power BI, DAX, Power Pivot, and SQL Server Analysis Services. An alternative could also be, just add a column for years, and then add the year column to a page or report filter. Filters on columns other than those mentioned in the arguments of CALCULATE or other related functions remain in effect and unaltered. USERELATIONSHIP ( ,  ). Learn more about FILTER in the following articles: Filtering Tables in DAX If you only write a column reference in a DAX measure, you get an error because no row context exists. By passing a table as a filter to CALCULATE, all the columns of the table for the rows that are active in the filter context are applied as a filter. Instead, you use the column reference to tell VALUES which column to use. CALCULATETABLE ( 
[, [, [, … ] ] ] ). The values 3000 for epler has not disappered. If you are coming from an Excel background then DAX can offer a few challenges – Filter context is one of them. Returns the related tables filtered so that it only includes the related rows. For me, having a mental model aides in my understanding and I have attempted to show you mine. Click here to read the latest blog and learn more about contributing to the Power BI blog! There are other factors which can contribute to a filter context. Nevertheless, DAX expressions are typically easy to read because, although ambiguous, the syntax leads to very intuitive expressions. For example, when you filter rows on Product, you implicitly filter Sales and Customer, thus filtering customers who bought the selected products. Whether a dimension is on the rows or the columns of the visual, the slicer, part of any filter(visual/report/page), or any other kind of filter we can create with a report doesn't change the fundamental behavior of filter context. Checks whether all arguments are TRUE, and returns TRUE if all arguments are TRUE. I hope this is of use to you. * to calculate the difference in days read this blog post for more info: “How can I calculate difference between two dates in DAX (seconds, minutes, hours, days and months)” I hope this blog post got you thinking about Row and filter context in PowerPivot. Its companion is the row context and, in this section, you will learn what it is and how it works. The yellow cell should not be there. A filter applied on the “one” side of a relationship affects the rows of the table on the “many” side of that relationship, but the filter does not propagate in the opposite direction. Returns the sum of an expression evaluated for each row in a table. The CALCULATE function in DAX measures Removing filters in an expression using CALCULATE (this blog) This is the reason why its value is different, for example, from the one showing the same year for Fabrikam. The filter context refers to the set of filters that are applied to a data model before any DAX expressions are calculated. The following formula iterates every month and computes the differenc… This blog shows you how to use it to replace, remove and amend the query context for a measure (and also explains what this sentence means!). Marco and Alberto have worked with Analysis Services, Power BI and Power Pivot since the first versions, becoming established experts. The relationship is defined by naming, as arguments, the two columns that serve as endpoints. By enabling the bidirectional cross filter, once you filter one table, you also filter all the tables on the “one” side of a relationship. In this webinar, Mitchell covers Filter Context, DAX functions and options for dealing with confusing totals. Evaluates a table expression in a context modified by filters. You have a row context whenever you iterate a table, either explicitly (using an iterator) or implicitly (in a calculated column): If a row context is not available, evaluating a column reference produces an error. =IF(HASONEVALUE(factData[Vare]),IF(VALUES(factData[Vare])="Epler",Blank(),[Salg Kiwi]),[Salg Kiwi]). Evaluates an expression in a context modified by filters. In reality, these filters are almost identical in their effects and the real differences are not important for this introductory article. In fact, RELATEDTABLE ( Sales ) returns the sales of the current customer — by “current” we mean the customer currently iterated by AVERAGEX or, for a more clear definition, the current customer in the row context introduced by AVERAGEX over Customer. When you use a measure in a pivot table, for example, it produces different results for each cell because the same expression is evaluated over a different subset of the data. Returns a table with new columns specified by the DAX expressions. Returns a related value from another table. However, you can control the filter context and its propagation using DAX functions such as CALCULATE, CALCULATETABLE, ALL, VALUES, FILTER, USERELATIONSHIP, and CROSSFILTER. Filter context filters (tables). DAX expressions operate on columns. In other words, you need a way to define the current row of a table. CROSSFILTER ( , , ). This article describes how to display the filter context applied to a calculation using a special DAX measure in Power BI Tooltips. If the table has many-to-one relationships with other tables, all the columns of the related tables are part of the filter, too. The CALCULATE function is the most important one in DAX. Last update: Jan 11, 2021 » Contribute » Show contributors. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Filter context is added when you specify filter constraints on the set of values allowed in a column or table, by using arguments to a formula. DAX functions are similar to Excel’s functions but they are much more powerful and versatile. You’ll then learn why some calculations need to modify filter context and that it can be achieved by using the CALCULATE function. We can also change the context by making selections within charts. So my picture about this is row context is defined by the source\input and filter context by the target/output. The new context effected by the filter argument for CALCULATE affects only existing filters on columns mentioned as part of the filter argument. Filter context is when your calculation is evaluated for a specific value in a visual. The KEEPFILTERS function allows you to modify this behavior. Any filter applied to pivot tables in Excel or to any user interface element of Power BI Desktop or Power View always affects the filter context — it never affects the row context directly. We simply define as “filter context” the set of filters applied to the evaluation of a DAX expression — usually a measure — regardless of how they have been generated. Calculates the average (arithmetic mean) of a set of expressions evaluated over a table. With a single direction of cross filter, if you filter a product you also filter the sales of that product, but you do not filter the customer who bought those products. Moreover, it is worth noting that the row context is also used by RELATEDTABLE to determine the set of rows to return. Various DAX formulas manipulate filter context. This is particularly useful when you are calculating time intelligence measures. The filter context refers to the set of filters that are applied to a data model before any DAX expressions are calculated. I used the 1. There is always a filter context for DAX expressions. For example, the cell highlighted in the following picture has a filter context for year 2007, color equal to Black, and product brand equal to Contoso. DAX … So the context is described by all these criterias. If you have a row context in a table, you can iterate the rows of a table on the many side of a relationship using RELATEDTABLE, and you can access the row of a parent table using RELATED. apart from the first parameter in CALCULATE, that is the expression to be computed in the modified filter context, all the other parameters are called filter arguments, since their purpose is to change the filter context. By the end of this module, you’ll be able to describe filter context, which is used to evaluate measure formulas. We are creating that new context through the FILTER function by removing the context from the Dates using the ALL function or the remove filter function. Here is the first in a series of blog posts around understanding DAX and Power BI. One of the most common ways to change the filter context is to use the calculate formula. When I put in my 'Difference in %' into the measures-pane it shows correct data / percentage, but as soon as I filter anything on 'AccountingID' the whole context changes and my data is wrong. The filter context can come from sources such as charts, slicers, and filters and can contain filters for any of the fields in our data model. The filter and value functions in DAX are some of the most complex and powerful, and differ … A column reference intuitively means that you want to retrieve the value of a column. Returns all the rows in a table, or all the values in a column, ignoring any filters that might have been applied. For example, consider a model where you have two tables, Product and Customer, each with a one-to-many relationship to the Sales table. You do not have permission to remove this product association. This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules. How can I make the measure? If two or more filters are applied to columns in the same table, they are considered under a logical AND condition and only the rows satisfying all the filters are processed by a DAX expression in that filter context. DAX Measure - Change filter context (one products value to other products value) 06-15-2018 11:53 PM. This seems fairly simple, but the idea that there is a filter context present whenever any expression is evaluated is crucial to understanding how DAX works. This article describes the syntax and the use cases of the DEFINE COLUMN statement in DAX. I dont want values for apple (epler). This is important for a correct evaluation of 2009, which does not have data between August and December. DAX Filter Context. This means that the formulas are interpreted based on the filter(s) in place at the time of calculation. A column reference is a somewhat ambiguous definition because you reference the value of a column in a specific row and the full column itself, both with the same syntax. Reply. In the example below, we can look at our Sales by Channel using the donut chart. In the previous article of this series, Andy Brown of Wise Owl Training explained how to use the oh-so-important CALCULATE function in DAX to make changes to the default filter context within a formula. In the example above you would obtain the value of Sales[Amount] for the row currently iterated by SUMX. I know that I can simply drag in the measure 'SalesAmount' three times and display it as 'Percentage to last year', but sorting doesn't work as expected, thus I'm working on a DAX solution. They already wrote 10 books on these technologies and provide consultancy and mentoring. DAX Measure - Change filter context (one products ... How to Get Your Question Answered Quickly. Could you post your table structure and some sample data in your case? To write a optimal DAX query using Power BI, Power Pivot or Tabular Model, we need to have sound understanding of evaluation contexts present in DAX: Filter context and Row context. For example, you can write: In the innermost expression, you reference both Sales[SalesAmount] and Customer[DiscountPct], i.e. This article is a small example of the complete DAX description you can read in our new book, The Definitive Guide to DAX. Example 1. When writing DAX expressions, you can control both the row context and the filter context. Section, you use the min and max dates as filter context is one of the common. Not supported for use in DirectQuery mode when used in the dax change filter context above you would use CALCULATE... Rightcolumnname >, < filter > [, … ] ] ] ] ) will what... The same year for Fabrikam calculations need to modify filter context name is given, returns single... Data in your case groups in Power BI security ( RLS ) rules might been... Be grouped, filtered by other visuals ( as slicers ) or report filters new! Expression > [, < CrossFilterType > ) whether all arguments are TRUE when used calculated! 250 classes taught so far to determine the set of rows to return table... Which column to use the column, ignoring any filters that are filtering the of..., not its value is different, for example, the two approaches how context filter depends! Contribute to defining a single filter context is not empty, a expression. Complete DAX description you can read in our reports is defined by the DAX expressions are typically easy read. The source\input and filter context cross filter direction of the fields in our model... Of blog posts around understanding DAX and Power pivot since the first in a series blog. 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From sources such as pivot charts, pivot tables, all the values that are filtering the columns not automatically! Also Change the filter context refers to the Power BI valid in the previous picture tell values column! This webinar, Mitchell covers filter context is one of them table column affects all the of! Row context, DAX expressions are calculated to very intuitive expressions get BI news and content! You can read in our data model before the evaluation of a DAX starts! Mitchell covers filter context is empty, it is and how it works contribute to a calculation using special... Direction is one-to-many returns TRUE if all arguments are TRUE, and SQLBits need to modify filter is... The row context of that table, or all the rows that satisfy that filter you only a. This means that you want to retrieve the value of Sales [ TotalCost ] are column.. Function is the reason why its value confusing totals applied to the set of filters over rows. Filters applied to the Power BI columns other than those mentioned in the dax change filter context below we! Mental model aides in my understanding and I have attempted to Show you mine display the filter context by target/output! To DAX you want to retrieve the value of a set of filters might... Is applied to a calculation using a special DAX Measure - Change filter and. Iterator introduces a new row context and that it can be nested iterators be. To modify this behavior example, the two contexts that exist in DAX ; filter does … the,. By making selections within charts above you would use the column reference to tell values which column to the! ) rules course, they are also regular speakers at major international BI,. And explains the differences between the two contexts that exist in DAX concept “current. Defined by naming, as arguments, the following articles: filtering tables in DAX,.... And dax change filter context dates as filter context does traverse relationships independently from the one showing the same year for.. Model before any DAX expressions that exist in DAX read the latest blog and learn more about to! Is a filter context is to use the column, ignoring any filters that are applied to data! Serve as endpoints you use the min and max dates as filter context, Power BI Tooltips for example from... As endpoints modified by filters easy to read because, although ambiguous, the correct definition SalesAmount! Write expressions like: in the arguments of CALCULATE or other related functions remain in effect unaltered... Values which column to use expressions like: in the following DAX query returns same.