How to order 1,2,3 not 1, 10, 11, 12 in mySQL

Question

The following code outputs in order of 1, 10, 11, 12 of id.

I want to make it 1,2,3,4...

Could anyone tell me what I should do please.

$Q = $         


        

Answer 1

First, add an order by clause at the end:

ORDER BY category_id

If category_id is a string, then you must treat it like an integer. There are a few ways to do this. I usually add a zero. You can also cast it.

ORDER BY category_id + 0