Question

I have an array like this :

$services = array(
               array("id" => "1", "desc" => "desc 1"), 
               array("id" => "2", "desc" => "desc 2" ),
               ......
            );

I want to insert those services in TABLE_SERVICE .
each service is inserted if it doesnt exists in TABLE_SERVICE , and deleted it if it exists in TABLE_SERVICE but not in $services array.

I could just delete all records in TABLE_SERVICE and then insert all $services elements ,
but that can be an issue with performance because i often have large set of data in both TABLE_SERVICE and $services .

So is there an efficient way to do this ?

Thanks.

Answer 1

If it was me I’d iterate over $services collecting ids:

$ids = array();
foreach($services as $service)
{
    $ids[] = $service['id'];
}

Then using PHP’s join and the select NOT IN

"DELETE FROM TABLE_SERVICE WHERE id NOT IN (" . join($ids,',') . ")"

After that, iterate over the array again to insert/update using ON DUPLICATE KEY

"INSERT INTO TABLE_SERVICE (id,desc) VALUES (?,?) ON DUPLICATE KEY UPDATE desc = ?"

Since oracle doesn’t have ON DUPLICATE KEY this stackoverflow question might help you with that last part.