Updating data in mysql vs.?

Question

PHP

Hello.
Through this query, I add fields such as model (article), quantity (quantity) and price (price) to the product database. How now to make an update in the database compared to the article? (model) i.e. so that only the price and quantities are updated, and with the article it only compares exactly where to update / add the price
$ins="INSERT INTO `product` (`model`,`quantity`,`price`
)VALUES('$cell1','$cell2 ','$cell3')";
$query = mysql_query($ins);
if(!$query){
die('Error');
}
}
}

Answer 1

UPDATE `product` (`quantity`, `price`) WHERE `model` = :model

And don't use mysql_ functions, they've been deprecated for two years now. use parametrized mysqli_ or PDO queries.