Question

I need to move some data from a table to a archive table.

Now I do it this way:

$sql = 'INSERT INTO history_products 
         SELECT * FROM products WHERE category_id='.$id;

And then I delete data from products table.

$sql_delete = 'DELETE FROM products WHERE category_id = '.$id;

Each product have a unique id.
But I want to make this in a secure way, now even if a row isn’t inserted in history_products the row will be deleted from products table. I don’t want to delete if insert fails.

Answer 1

I expected you have a field called id (ProduktID), which products must have the same id in both tables then, the following should work.

Delete from products where products.id IN (Select history_products.id from history_products)