How does excel add a data source to a data table?

1. Create a data graph, and press ctrl to drag the mouse to select three columns of data, as shown in the following figure.

2. Click "Insert" -- "bar chart" on the menu bar, as shown in the following figure.

3. Now we can see that the chart is successfully inserted, but the data is missing. Now let's see how to add this column of data.

4. Now we also click "design" -- "select data" on the menu bar, as shown in the following figure.

5. The "select data" dialog box is displayed. Click the Add button at the position shown in the figure.

6. Click the data area button here.

7. As shown in the following figure, you can customize the chart data area.

8. You will see that this column is added.