How to get ID of the last updated row in MySQL?

Question

How do I get the ID of the last updated row in MySQL using PHP?

Answer 1

Hm, I am surprised that among the answers I do not see the easiest solution.

Suppose, item_id is an integer identity column in items table and you update rows with the following statement:

UPDATE items
SET qwe = 'qwe'
WHERE asd = 'asd';

Then, to know the latest affected row right after the statement, you should slightly update the statement into the following:

UPDATE items
SET qwe = 'qwe',
    item_id=LAST_INSERT_ID(item_id)
WHERE asd = 'asd';
SELECT LAST_INSERT_ID();

If you need to update only really changed row, you would need to add a conditional update of the item_id through the LAST_INSERT_ID checking if the data is going to change in the row.