Query overview in Power BI Desktop
With Power BI Desktop you can connect to the world of data, create compelling and foundational reports, and share your efforts with others – who can then build on your work, and expand their business intelligence efforts.
Power BI Desktop has three views:
- Report view – where you use queries you create to build compelling visualizations, arranged as you want them to appear, and with multiple pages, that you can share with others
- Data view – see the data in your report in data model format, where you can add measures, create new columns, and manage relationships
- Relationships view – get a graphical representation of the relationships that have been established in your data model, and manage or modify them as needed.
These views are accessed by selecting one of the three icons along the left side of Power BI Desktop. In the following image, Report view is selected, indicated by the yellow band beside the icon.
Power BI Desktop also comes with Query Editor, where you can connect to one or many data sources, shape and transform the data to meet your needs, then load that model into Power BI Desktop.
This document provides an overview of the work with data in the Query Editor. There's more to learn, of course, so at the end of this document you’ll find links to detailed guidance about supported data types, connecting to data, shaping data, creating relationships, and how to get started.
But first, let’s see get acquainted with Query Editor.
The Query Editor
To get to Query Editor, select Edit Queries from the Home tab of Power BI Desktop.
With no data connections, Query Editor appears as a blank pane, ready for data.
Once a query is loaded, Query Editor view becomes more interesting. If we connect to the following Web data source, Query Editor loads information about the data, which you can then begin to shape.
Here’s how Query Editor appears once a data connection is established:
In the ribbon, many buttons are now active to interact with the data in the query
In the left pane, queries are listed and available for selection, viewing, and shaping
In the center pane, data from the selected query is displayed and available for shaping
The Query Settings window appears, listing the query’s properties and applied steps
We’ll look at each of these four areas – the ribbon, the queries pane, the data view, and the Query Settings pane – in the following sections.
The query ribbon
The ribbon in Query Editor consists of four tabs – Home, Transform, Add Column, and View.
The Home tab contains the common query tasks, including the first step in any query, which is Get Data. The following image shows the Home ribbon.
To connect to data and begin the query building process, select the Get Data button. A menu appears, providing the most common data sources.
For more information about available data sources, see Data Sources. For information about connecting to data, including examples and steps, see Connect to Data.
The Transform tab provides access to common data transformation tasks, such as adding or removing columns, changing data types, splitting columns, and other data-driven tasks. The following image shows the Transform tab.
For more information about transforming data, including examples, see Combine and Shape Data.
The Add Column tab provides additional tasks associated with adding a column, formatting column data, and adding custom columns. The following image shows the Add Column tab.
The View tab on the ribbon is used to toggle whether certain panes or windows are displayed. It’s also used to display the Advanced Editor. The following image shows the View tab.
It’s useful to know that many of the tasks available from the ribbon are also available by right-clicking a column, or other data, in the center pane.
The left pane
The left pane displays the number of active queries, as well as the name of the query. When you select a query from the left pane, its data is displayed in the center pane, where you can shape and transform the data to meet your needs. The following image shows the left pane with multiple queries.
The center (data) pane
In the center pane, or Data pane, data from the selected query is displayed. This is where much of the work of the Query view is accomplished.
In the following image, the Web data connection established earlier is displayed, the Overall score column is selected, and its header is right-clicked to show the available menu items. Notice that many of these right-click menu items are the same as buttons in the ribbon tabs.
When you select a right-click menu item (or a ribbon button), Query applies the step to the data, and saves it as part of the query itself. The steps are recorded in the Query Settings pane in sequential order, as described in the next section.
The query settings pane
The Query Settings pane is where all steps associated with a query are displayed. For example, in the following image, the Applied Steps section of the Query Settings pane reflects the fact that we just changed the type of the Overall score column.
As additional shaping steps are applied to the query, they are captured in the Applied Steps section.
It’s important to know that the underlying data is not changed; rather, Query Editor adjusts and shapes its view of the data, and any interaction with the underlying data occurs based on Query Editor’s shaped and modified view of that data.
In the Query Settings pane, you can rename steps, delete steps, or reorder the steps as you see fit. To do so, right-click the step in the Applied Steps section, and choose from the menu that appears. All query steps are carried out in the order they appear in the Applied Steps pane.
The Advanced Editor
If you want to see the code that Query Editor is creating with each step, or want to create your own shaping code, you can use the Advanced Editor. To launch the advanced editor, select View from the ribbon, then select Advanced Editor. A window appears, showing the existing query code.
You can directly edit the code in the Advanced Editor window. To close the window, select the Done or Cancel button.
Saving your work
When your query is where you want it, you can have Query Editor apply the changes to the data model into Power BI Desktop, and close Query Editor. To do that, select Close & Apply from Query Editor's File menu.
As progress is made, Power BI Desktop provides a dialog to display its status.
Once you have your query where you want it, or if you just want to make sure your work is saved, Power BI Desktop can save your work in the form of a .pbix file.
To save your work, select File > Save (or File > Save As), as shown in the following image.
There are all sorts of things you can do with Power BI Desktop. For more information on its capabilities, check out the following resources:
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