Updating multiple rows in mysql best online dating reviews
As My SQL doesn’t have inherent support for updating more than one rows or records with a single update query as it does for insert query, in a situation which needs us to perform updating to tens of thousands or even millions of records, one update query for each row seems to be too much.
Reducing the number of SQL database queries is the top tip for optimizing SQL applications.
By iterating over this multidimensional array, each user record will be updated by setting current iteration values to My SQL UPDATE query.
After successful update, the page will be redirected to list view by using PHP location header. Because we need not show any user interface and it requires only the array of selected row ids.
The HTML tags will recursively create with dynamic values for each iteration of the loop.
Checkbox added to each user’s row will contain their id, accordingly, as its value.
For selecting multiple rows, we are going to use checkbox input for submitting selected rows reference.
And, it will look like, These values will be passed as an array of user ids to the PHP page.
First, let us start coding for updating multiple rows.
And then, we can simplify it for delete operation by removing unwanted steps like a form submits and etc.
Remember these same variables can be inserted as inputs in a form on the front-end of the application.