Prefilling a hidden field with a value indicating where the link to reach the form was clicked.Here are some examples of what prefilling through the URL can achieve: This is called “Prefilling.” You can accomplish this by using a "prefilled link" or "prefilling through the URL". Building off Matt Mason’s ideal, we will only use his ‘ GetData’ function and build off that.When publishing or sending out your forms, you may wish to have some information automatically populate into the fields in your form. This is where Miguel comes in and adjusts the code a little so that it does not adopt the brute force method anymore as well as fix the permissions bug that has developed in Power Query. Furthermore, if you try Matt’s method now with the newest version of Power Query, you may receive an error claiming that you do not have access to the database. He points out that if this method is used together with third party software such as Fiddler (more on Fiddler later), Power Query will be found trying to evaluate all 10,000 pages. Matt Mason’s method adopts a brute force method where it instructs Power Query to run through pages 1 to 10,000 and stop when Power Query runs into an error or a ‘null’ value. The solution to this problem was produced by a combined effort of Matt Mason, his blog post can be found here and Miguel Escobar, whose video explains his method well. The above deals with manual importation of the data, but what about the page number issue? The data still needs some cleaning up however, you can learn how to do that by keeping up with our Power Query Pointers series! To launch Power Query, we’ll use Excel 2016 and select ‘New Query’ from the ‘Data’ tab: It does not matter which year we wish to begin with for this example, we shall begin with 2017 (it’s a little too early in the year for 2018!): For example, we wish to retrieve the gross earnings of all of the movies released in a particular year, along with their current rank and their studio. Let’s work through a simple example to illustrate Custom Function’s utility. The benefit of having a custom function is that we can repeat the same steps to a refreshed dataset if need be. A custom function is a query that is run by other queries, for those of you who know Java from coffee beans, and is similar to what is known as an Object Method. One proposed solution, proposed by MVP Reza Rad, is to utilise Custom Functions in Power Query. the inability to manually retrieve all of the data just by importing it using Power Query. Let’s address the first issue, then, i.e. The webpage does not change its URL when a new page of data is displayed.We do not know how many pages of data the website has.We are unable to manually pull all of the data from the website.Additionally, we also note that we cannot be certain how many pages of data this website has either. Essentially, the website uses JavaScript code to dynamically refresh the list of players on one page, thus enabling the webpage to dynamically refresh the player list in one page, without changing the webpage’s URL. This is because Power Query retrieves data based on the URL and in this case our Power Query friendly hockey statistics website displays data using JavaScript. To manually import the data from this hockey statistics site using Power Query, first open Excel then navigate to the ‘Data’ tab and click on the ‘New Query’ option, then select the ‘Other Sources’ option followed by ‘Web’. You should note that this method does not yield the complete list this will be detailed later on. So how may we extract all of the data? To answer this, let’s get there in five steps.īefore we move on to our proposed solution, we should first cover how to manually import data from the hockey statistics site. This seemingly defeats Power Query (or Power BI) as URLs for each page of table data are required. When you click on the second or subsequent page of data, the URL for the website does not change. The thing is, the embedded table actually has 17 pages of data and let’s say we wish to extract all of this data for analysis elsewhere. The webpage is nicely set out and contains a table of hockey player statistics.
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