Grouped Column Chart Showing Most Common Items Sold by Store Location

At the top-right corner of the dashboard, click Add Chart.

Select the sample_supplies.sales data source.

In the Select Data Source modal that appears:

1. Click the Project tab.

2. Click the name of the deployment that contains the sample data source.

3. Click the sample_supplies database. The database's data sources appear.

2. Click Select on the sales data source.

Select the Chart Type

1. In the Chart Type dropdown, select Column.

2. Click Grouped below the dropdown.

Add the desired fields to the proper encoding channels.

1. Drag the storeLocation field to the X Axis encoding channel. The X Axis encoding channel dictates which field to use when creating the column groups.

   Example

   X Axis Encoding Channel

   Using storeLocation for this encoding channel allows us to visualize a group of items per store location.

2. In the Fields section click the items field to expand the items object and view its properties.

3. Drag the items.name field to the Y Axis encoding channel. The Y Axis encoding channel determines which field to use for the chart's aggregation.

   Example

   Y Axis Encoding Channel

   Using items.name for this encoding channel allows us to aggregate and count the items sold in each location.

4. In the Array Reductions dropdown, select Unwind array.

5. In the Aggregate dropdown, select count.

   Example

   Count

   The count option counts the occurrences of each item name after unwinding the items array and displays them in the chart grouped by store location.

   For more information on the $count aggregation command, refer to the count aggregation documentation.

6. Drag the items.name field to the Series encoding channel.

   Example

   Series Encoding Channel

   The Series encoding channel dictates how to split each group of the chart. Each member of the series becomes a column within the group, so each item name becomes a column within the store location group.

7. In the Series Array Reductions dropdown, select Unwind array.

Your chart should now look something like this:

click to enlarge

The item sales look to be fairly evenly distributed by store location. Notice based on this chart that notepads are the most common item sold at all store locations, which is useful information when stocking each store with its inventory.

Title your chart.

1. Hover over your chart title and click the pencil icon.

2. Copy the following into the title input:

   Most Common Items Sold by Store Location

3. Click the check mark to save your title.

Click Save and Close at the top-left of the chart builder view.

Your dashboard should now look something like this:

click to enlarge