Hi Rafal!
When using a table in DashBoard, you can set a config property to enable sorting. Config options can be entered down here:

One of those config options has the key "w.sortable". If you set that to true, you will be able to sort your tables by clicking on the column header.

Now, clicking a column header will cause it to sort, toggling between ascending and descending sort.

Hope that helps!
Kyle
#DashBoard