How to connect the $DB global variable to Bitrix in a separate file?

Question

1C-Bitrix

Good evening. I’m not very sure about the elegance of the chosen method for solving the problem, but I’m not very friendly with Bitrix, and I don’t know how to solve my problem using infoblocks. Therefore, I decided to make my own tables in the database and already operate with them.
The point is this. There is a component template, where I create a separate file, example.php, and put all the code that is needed to work with my tables from the database into it. I access this file with Ajax, everything seems to be fine. But the problem is that I want to use $DB->Query to access the database. It seems like you need to make it all available using the global $DB, but it does not connect. How can this problem be solved?

Answer 1

Show the code for your file.
Perhaps you have not connected prolog_before - Bitrix service part.
This is done as follows: at the beginning of the script, it is written:

require $_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php";