Question

When executing

SELECT item_id FROM (`phppos_items`) WHERE `item_id` = '1001-1001'

I get back this row

1001

item_id is an int auto-incrementing column. How do I prevent this from happening?

Answer 1

item_id is an integer column.

Therefore, when you compare it to a string ('1001-1001'), this string is converted to an integer. The string '1001-1001' is converted to the integer 1001, so it matches the column you got back.

As for how to avoid it, it depends on what you’re trying to do. If you’re trying to find a row having the id '1001-1001', that just won’t exist, as the column contains only integers.

If you’re trying to find all ids inside of a range, try using the BETWEEN ... AND ... operator instead:

SELECT item_id FROM (`phppos_items`) WHERE `item_id` BETWEEN 1001 AND 1001