SELECT t.email
FROM   otz_user_header t
       JOIN otz_customers r
         ON t.user_id = r.customer_user_id
       JOIN otz_customer_ratings cr
         ON cr.customer_user_id = r.customer_user_id
WHERE  r.rate_auto_approve = 0
       AND r.rate_email_time IS NOT NULL
       AND r.total_rating_count IS NOT NULL
       AND cr.rating_date < Curdate()
       AND cr.rating_date > Date_sub(Curdate(), INTERVAL 7 day)

public function test(){
        $sql = "SELECT t.email
            FROM otz_user_header t
            JOIN otz_customers r ON t.user_id = r.customer_user_id
            JOIN otz_customer_ratings cr ON cr.customer_user_id = r.customer_user_id
            WHERE r.rate_auto_approve =0
            AND r.rate_email_time IS NOT NULL
            AND r.total_rating_count IS NOT NULL
            AND cr.rating_date < CURDATE( )
            AND cr.rating_date >DATE_SUB( CURDATE( ) , INTERVAL 7
            DAY )";

        return Yii::app()->db->createCommand($sql)->queryAll();
            }

'activeCustomers'=>array(self::HAS_MANY, 'Customer', 'customer_user_id', 'condition' => 'activeCustomers.rate_auto_approve=0 AND activeCustomers.rate_email_time IS NOT NULL AND activeCustomers.total_rating_count IS NOT NULL'),

'lastWeekRatings'=>array(self::HAS_MANY, 'CustomerRating', 'customer_user_id', 'condition' => 'lastWeekRatings.rating_date < CURDATE() AND lastWeekRatings.rating_date >DATE_SUB( CURDATE(), INTERVAL 7 DAY )'),

$useremails = UserHeader::model()->with('activeCustomers', 'activeCustomers.lastWeekRatings')->findAll(array(
    'select' => 't.email'
));
print_r($useremails);