This image shows the Data Flow editor used to create data flows. There are three panes: the top pane is the workflow diagram, the middle pane shows the Step editor, and the bottom pane shows the visualization. The top pane, or workflow diagram, contains a graphical diagram composed of icons and lines representing the left to right steps included in the data flow. It shows the two selected data sources (Sample Order Lines and Sample States). A line from the Sample Order Lines data source joins to another step that is labeled Select Columns, next a line joins to a Filter step. Next a merged line shows that a join was added to the Sample States data source and the Filter step. Next a line shows that a Select Columns step was added. And next a line shows that an Aggregate step was added. The first Select Columns step is in blue, indicating that it’s the active step and the selected columns are displayed in the Step editor below (note that the other steps described before are in grey, indicating that they aren’t selected), except for the Aggregate step, which is highlighted because the cursor hovers over the Add a step symbol showing that the user wants to select this option to add another step to the data flow diagram.

The middle pane, or Step editor shows the details of the active Select Columns step. The pane displays two columns, the first shows the available columns and second shows the selected columns from the Sample Order Lines data source. This image shows that all columns are selected except for the OrderID column.

The bottom pane, or visualization pane, shows the result of the columns selected in the highlighted Select Columns step. The pane displays data from the selected columns from the Sample Orders data source.