$data = $model->field('pay_order_number,game_name,user_account,promote_account,pay_amount,pay_way,selle_ratio,convert(pay_amount*selle_ratio,decimal(10,2)) as income,pay_time,selle_status')
$data = $model->field('pay_order_number,game_name,user_account,promote_account,pay_amount,pay_way,if(selle_ratio >= 0,selle_ratio,0) as selle_ratio,convert(pay_amount*if(selle_ratio >= 0,selle_ratio,0),decimal(10,2)) as income,pay_time,selle_status')