title: PHP, indexing mysql ID in json. Is it worth it?
body: <p>I have a database in which i've got a table where im having question to be displayed randomly on the main site (about 80 for now). Im reading all the IDs from the database and then randomly selecting one and doing next query to get all the rest needed data of this one. And im curious if should i leave this like that or would it be bether to store all the IDs in .json file and just update it every time i add a question. What is bether? Thanks for help.</p>