Finally figured it out using the following function, Table.TransformColumnNames(table as table, nameGenerator as function, optional options as nullable record) as table. I am reallys stuck and have been hacking away at this for a while. were you able to get this working? From basic find and replace to more complex formulas, we've got you covered. Every time program had exported the data, column names exported with a random number of spaces. We can use a List in Power Query to make this dynamic. For example, the Dynamic column header with a data role index of 1 will be linked to the Dynamic column value that has a data role index of 1: Once we create the custom visual, its time to go back to the report. the Renamed columns1 step seems like it should work, but then it throws the error. For instance, State column will have its header defined by State Title field, since both share the same order, which is 1. Power BI. Connect and share knowledge within a single location that is structured and easy to search. This is how the final product looks: Both the source code of the custom visual and the sample report can be found in this public repository along side with more technical details about how this demonstration was achieved. What is Wario dropping at the end of Super Mario Land 2 and why? Otherwise I think you need to clarify your question for DAX/Report experts. Dynamically updating column names based on a mapping tablecould be super useful if only the output workednot just with flat Excel tables, but alsowith Power BI reports and Excel pivot tables! If Department 2 will use my application that time the field names will be A B C which will replace the same Data Table(Table1) field names i.e F1 F2 & F3. Sometimes though the column you are renaming can have different names with each refresh, so this method wont work. Looking at your first code in your reply, it looks like "Dimension" is the table in which the data is being pulled. Not sure whathow that would be generated automatically. Details: List. How do I properly use table.group in a PowerQuery query to dynamically summarize different rows and columns? Is there any way to dynamically change column name from its values. For simplicity, I've hard coded the 5, but if your table can change (such that the columns you need to rename may not always be the last 5), then a more dynamic approach might be something like: oldNames = List.Select(Table.ColumnNames(someTable), each Text.EndsWith(_, " Value")). where Table2 is "Rename Table" and Table1 is initial table with data. Otherwise, return null. It is like IFERROR() in Excel. Unfortunately, it doesn't seem so. 3- Create relationship between both datasets on the basis of Index. I'll learnt a lot from stepping through your solution, thank you! The underscore is a record type argument holding all the column values of the current row of an iteration. This will pick up all column names ending in " Value", including any that you might not want to rename, but it's just an example and you can tweak the predicate function as necessary. Therefore, if that value changes, the header title will dynamically change as well. Would there be a way to utilize a Switch or IF function for the name based on a slicer? The standard function to rename columns in the query editor of Power BI or Power Query is Table.RenameColumns. The second parameter, here, plays the main role. From the ribbon, click Add Column > Index Column (dropdown) > From 0. Its also used in row2filter context transition and other aspects of the data model that involve filter propagation throughout the model. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Lets analyze the Visualizations pane: This data role will contain only a single field and thats the ID. Thanks for a great solution. If commutes with all generators, then Casimir operator? I have released my first template app which is Free to download here: http://bit.ly/2othNWm and one trick I use is to change column names based on parameters. 2- After that create duplicate dataset for columns un-pivot. 2.) As the list of supported languages grows, more visualizations and bookmarks will need to be created, making it hard to scale in the long run. The visual will consist of a simple and plain table, allowing to have multiple columns and rows. Lets explain the most important parts about the script so far: As a side note, the same could be achieved by using Table.ColumnNames() function which would give us a list of all table column names. If we run that expression, this is how it looks like in PowerQuery: Each nested list is holding the original and new name of the column. We will need to use Table.RenameColumns() function, but with a dynamic argument holding column names to change. previous = measure. Generating points along line with specifying the origin of point generation in QGIS. We also get your email address to automatically create an account for you in our website. https://community.powerbi.com/t5/Power-Query/Dynamic-Column-Names/m-p/862358, https://www.youtube.com/watch?v=fSHcLxA9rY4, https://www.youtube.com/watch?v=yEemVBiaTuk. That will cause problems in the refresh. The easiest way to rename a column in Power Query is to do it the same way you do in Excel - just double-click it and rename it. Sometimes though the column you are renaming can have different names with each refresh, so this method won't work. Unexpected uint64 behaviour 0xFFFF'FFFF'FFFF'FFFF - 1 = 0? The dropdown listbox to the left of the formula bar should now say Format, and the formula in the formula bar should have a format string. Stating the original problem according to Ivan's solution, here goes. I like how Table.ToRows strips out the column names and Table.FromRows rebuilds the table again with List2 as the column new names. Check this video if you want to do that to. We are going to extract that date and make it a column, as it should be, and then rename both columns regardless of what they are called. Infact, under column values it is showing error #This field can't be used since it is invalid. With the Index column selected click Transform > Standard (dropdown) > Modulo. 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Series: https://goo.gl/FtUWUX- Power BI dashboards for beginners: https://goo.gl/9YzyDP- Power BI Tips \u0026 Tricks: https://goo.gl/H6kUbP- Power Bi and Google Analytics: https://goo.gl/ZNsY8lPOWER BI COURSES:Want to learn Power BI? It takes a nested list of old and new column names as its second argument. 1. The keyword each is a sugar syntax for iterating function invoke that is holding a single underscore argument that is entering the function. The easiest way to achieve that through the PowerQuery user interface is to add a new custom column and write the following expression. No do-overs. You can further enrich the function in case you need more control over the new column names. In all other rows, it returns errors. These tables will have different header titles based on the required language, however, only one of those tables will be shown depending on the language selected by the user. Many thanks for your help. The try/otherwise construct says Try this formula. Carl's has the same result and is a little simpler for the example I gave, however, my situation will benefit from having the rename pairs set out explicitly in a table (ie. Posted June 27, 2022. Explanation ALLSELECTED is one of the most complex functions in DAX. A possible solution for this requirement would be to create a different copy of our table visualization for each of the languages that we want to support. Not the answer you're looking for? However, when you rename columns through some dynamic logic, this mechanism isn't triggered and the column references in reports are broken. In that case, you would need to adjust the inner environment variable. If your data has rows that move around a bit because someone inserts or deletes rows above it, see this blog post on how to dynamically find that first row and remove the appropriate number of rows. "When you rename a column in the Query Editor of Power BI.., it implicitly triggers the column references in your reports to be updated. previous 2 = measure. Thank you. 2.) If you dont know what a custom visual is, you can check this introductory article where we talk about it. The filtering is set to single select to avoid selecting multiple languages at once. Follow these steps in order to change column name dynamically. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. This is very easy to set up and awesome when it's finished. Rename option in the Transform tab: In the Transform tab . Right click on column to Unpivot: Right click on the column you want the data to be pivoted & click on unpivot Other Columns. English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus". Plus using the MissingField.Ignore parameter with Table.RenameColumns means that it will only change the selection of columns I want to rename in my production query, the rest will remain unchanged. 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Any help would be most appreciated! As a rule of thumb, you should not use it in iterative functions. Introduction In this example, we will explain a very important feature of CALCULATE filter arguments. "When you rename a column in the Query view of the Power BI Designer Preview, it implicitly triggers the column references in your reports to be updated. I need this that i can use same template in every customer case and i dont have to change Dimension names every time i change data source. Next, we need to zip the new names and the old names together using List.Zip. Lets break this down from the inside out: Text.BeforeDelimiter([Column2], ) - in the first row of data, this will return the 11/20/2020 text. We put the whole logic of nested lists inside of a ListObjectWithCleaningLogic step. It is each column name in the table from the Promoted Headers step. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Infact, under column values it is showing error #, ------- Dynamic field names as values for the above line for Dept 2, not just with flat Excel tables, but also. Name the column Date and use this formula: You dont have to have the line breaks and indents, it just makes it easier to read. The try/otherwise construct takes care of it. To get a nested list of lists, we also need to transform that NestedLists column to a list. I'll step it out in my original problem for completeness. In this video, I take you through a quick tutorial to demonstrate how to set up dynamic columns in a table in Power BI. English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus", Get the names of the 5 rightmost columns of the table (which should give you a list of 5 strings, all of which end in. Does anyone know a good workaround to preserve column references in the visuals after applying such a bulk rename step? No hidden fees. I feel like I am really close to getting this to work, but I keep getting the following error: Expression.Error: We expected a RenameOperations value. Lets see what we can do about it. Replace the format string with the following DAX expression, and then press Enter: DAX. If we want to make our rename columns function dynamic we need to alter the nested lists argument so that it accepts wrong and correct column names for each column. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Thats how we programmed our custom visual. SUGGESTIONS? Notice the Index column has values 0, 1, 2 repeating. I am trying to dynamically rename a set of columns in Power Query, List1 being the original column names and List2 the new column names. Its based on three core promises: transparent pricing, short-term flexible contracts, and time zone affinity. Asking for help, clarification, or responding to other answers. On the other side, doing so makes Power Query code less readable and editable plus you need to do some typing (coding). The largest, in-person gathering of Microsoft engineers and community in the world is happening April 30-May 5. Your valuable feedback, question, or comments about this post are always welcome or you can leave us message on ourcontact form, we will revert to you asap. In the CleanColumnNames step we called the table as it was at the source step (before we created the nested lists step), and as a second argument to the Table.RenameColumns() function we provided the nested lists applied step. Check it out, Introduction to Power BI FREE Online course, Power Query Online Training [updated 2022], M Language Online Course: The unofficial and Practical Reference Guide, Dynamically find and filter header rows and promote them in Power Query. STEP 1: Import the dataset. If you have a table with old and new names then you can use following pattern. Improve your PowerQuery skills with Exceed Academy. Now that we have the correct argument form, we need to create a function that would accept a table variable with messy column names and clean it with the logic we already set in the list argument.Following is the complete M function code: We used this technique to dynamically change column names without transposing the table structure. I've gone with Ivan's answer because in production, I have some columns that I don't want to rename plus I was trying to figure out how to use the Table.RenameColumns function properly. In order to add multilanguage support to our report, we need to have a record for each title translation that can be displayed. This is the simplest part of the tip. Hypothetically, if I had a slicer based on Seasons of the year, I would want my columns to reflect the names of the month in that season. The syntax for the function is: Table.TransformColumnNames (table as table, nameGenerator as function, optional options as nullable record) The first parameter is the table name. Has the Melford Hall manuscript poem "Whoso terms love a fire" been attributed to any poetDonne, Roe, or other? This visual allows us to generate the title based on a measure: And thats it, the custom visual is ready to be tested. That isnt a problem and youll see why in a minute. We can use a List in Power Query to make this dynamic. Parker here. Again, remove any automatically added Changed Type step if Power Query added one. Now we have something that looks like this: Ok, lets get to work. As you say, the replacement column names would need to be listed in the correct order within List2. Well add it back at the end when our column names are predictable. Did the drapes in old theatres actually say "ASBESTOS" on them? Key features our custom visual will have: Data roles define the type of data that our visualization will receive as input. What if we could have just one single table with dynamic header titles that change depending on the selected language? Rename the table: Rename the duplicated table to avoid the confusion. The solution is simple, instead of using a static text box, like in the first approach, well opt for a card. If we try to change the column names manually, this is the code we get: Now, if we focus on the second argument of the Table.RenameColumns() function, we can see that it is returning a nested list of lists! Connect and share knowledge within a single location that is structured and easy to search. What's the function to find a city nearest to a given latitude? Youll find me here: Linkedin https://goo.gl/3VW6Ky Twitter @curbalen, @ruthpozuelo Facebook https://goo.gl/bME2sB#CURBAL #SUBSCRIBE This is a good solution but after changing the column name with the help ofPower Query Formula Language (M), when I apply those chnages to dashboard the visuals were failed load. Then, click the small drop-down arrow located to the right of the column name. We have a simple report that shows some useful insights about US states: So far so good, but it turns out that this report will be consumed by several people from around the globe, whose mother tongue isnt necessarily English. However, when you rename columns through some dynamic logic, this mechanism isn't triggered and the column references in reports are broken. The goal is to always keep the Internationalization table filtered by a single row/translation. From here, you can type in the new column name, and click "Ok" when done. Change column names dynamically with parameters in Power BI. Strangely enough, this limitation/bug reported in 2015 still seems to be the 'state-of-the-art': "When you rename a column in the Query Editor of Power BI.., it implicitly triggers the column references in your reports to be updated. Each dynamic column value must have a corresponding dynamic column header. Thanks Ivan, I've restated the original example using your solution. We can use a function called Table.ColumnNames() for this. We have only a single table argument entering our function (TableWithDirtyNames). To begin with you need a small dataset: Next create a list of values using curly braces, these values will act as the new names of the columns. 2) On the Add Column ribbon click Add Custom Column. In my example, here's my code for MyFuncRenameColumns: Here's where you use it as one of the parameters for Table.TransformColumnNames: Thanks for contributing an answer to Stack Overflow! If you have a table with old and new names then you can use following pattern. And Index column not support the Direct Query Mode. But we will have another table where we will have dynamic field names. Receiving an adequate list argument for the Table.RenameColumns() function was the harder part of development. 4. We can transform rows from a table to a record type using the curly brackets syntax.On the other hand, we transform tables to lists by writing the name of the column in round brackets.If we were to combine round and curly brackets, we would drill into a single cell from that table (picture below). Once your account is created, you'll be logged-in to this account. Generally, we use the output of the previous step in here. Parabolic, suborbital and ballistic trajectories all follow elliptic paths. To learn more, see our tips on writing great answers. Log In, Curbal has its own social media server on Mastodon. The largest, in-person gathering of Microsoft engineers and community in the world is happening April 30-May 5. Date.FromText() will take the date in the first row and convert 11/20/2020 to a real date. let rename_list = Table.ToColumns (Table.Transpose (Table2)), result = Table.RenameColumns (Table1, rename_list, MissingField.Ignore) in result. Benedikt Alat za raunovodstveni kontroling i analizu, {0} in DemoteHeaders step is used to create a record from a table holding only the first row from the demoted headers source table. This is . I have the exact same issue. The Table.ToColumns(Table.Transpose) solves the "I need to merge List1 and List2 into a single list of pairs" nicely as the second argument for Table.RenameColumns. We use cookies to ensure that we give you the best experience on our website. Why typically people don't use biases in attention mechanism? when i select a month from slicer , i want to see my meaure "revenue" with the month name from slicer. What risks are you taking when "signing in with Google"? However if I leave it at R6-1 then I have to go to the displayed tables and changed the column names one by one every month. Now we have 2 columns holding wrong and correct column names that we need to transform to list of nested lists.The easiest way to achieve that through the PowerQuery user interface is to add a new custom column and write the following expression. Making statements based on opinion; back them up with references or personal experience. Using the general approach of demoting headers -> transposing tables -> cleaning the first column -> transposing again was not an option because files were big, therefore double transpose would take forever to process. Now, lets focus on the formula bar, specifically each keyword. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Dynamically Changing the Field/Column Name Based on Value of Other Column, How a top-ranked engineering school reimagined CS curriculum (Ep. Wrestling Excel files to the ground until a decent Power BI report can be made. First create a nameGenerator function (e.g. In my example we can switch in a slicer between Money and Volumes. It is preferable to use it only as a CALCULATE filter remover, not as a table function. What is Lineage? Information and consulting on Business Intelligence using Microsofts Power BI and Excel applications. Microsoft Power BI Learning Resources, 2023, Learn Power BI - Full Course with Dec-2022, with Window, Index, Offset, 100+ Topics, Formatted Profit and Loss Statement with empty lines, How to Get Your Question Answered Quickly. if so please share? Copy. Find out about what's going on in Power BI by reading blogs written by community members and product staff. COMMENTS? If total energies differ across different software, how do I decide which software to use? The article was inspired by a request from a client who had issues exporting data from its data warehousing program to .csv files. I have released my first template app which is Free to download here: http://bit.ly/2othNWm and one trick I use is to change column names based on parameters given by the end user. Thanks Carl, I'll take a look at this. Not the answer you're looking for? Fortunately, theres a better option to the one described above. Renaming Column Headers. Power Query will then automatically update the column . In this video, I take you through a quick tutorial to demonstrate how to set up dynamic columns in a table in Power BI. There was no predictable logic on where it could introduce additional characters in the export. As far as I know, it is not possible to do it currently. Parker here. It certainly looks a lot simpler than my solution! All we need do is create a connection to SQL Server and import the FactInternetSales table to Power BI as seen below. Say goodbye to manual column renaming and hello to more time for analyzing your data! If you continue to use this site we will assume that you are happy with it. When you login first time using a Social Login button, we collect your account public profile information shared by Social Login provider, based on your privacy settings. Does the 500-table limit still apply to the latest version of Cassandra?