In outsystems chart how to group by months?

In outsystems chart how to group by months?

  
Good night,
I create one chart, i have date yyyy-mm-dd but i need group resoult by moths?
I used this video http://www.youtube.com/watch?v=DrqiQRiJ6bY

Thanks for your help.
Hi Bruno,
The best way to group by month would be to do so in the query that retrieves the chart's data, and then simply use it directly on the chart.