The CGridView widget is very useful and customizable, but sometimes you need a little more.
One limit I found is to have only one row for headers; yes, you can write each column header in more than one row, but just inside the single cell.
I was looking instead for the possibility to use more than one row, with different structure one from the others.
This way you can write columns grouping headers, and obtain a nicer view.
Using CActiveRecord->updateAll() and CActiveRecord->deleteAll() with scopes and criteria requires some tricks that are explained in this article. While findAll() , find() and some other methods use scopes automatically, updateAll() and deleteAll() do not.