Question

I am trying to find a way to collect data using sql aggregate functions like max, min and count.

And I found that CStatRelation class seems to be what I want. CStatRelation doc

It can be used in the relation function in Yii’s model class.

The usage is like this:

class SomeModelClass extends CActiveRecord{

 public function relations() {

        return array(
            'bidCount'=>array(self::STAT,'Bid','auction_id'),//it can be used like this


        );
    }
}

The default value of the rowCount in the example code is the count(*). But what if I want to find the max/min value of a specific column??

How can I modify the code to retrieve the max or the min??

Answer 1

'maxBid' => array(self::STAT, 'Bid', 'auction_id', 'select'=>'MAX(bid_amount)'),