Maybe I just don't understand SQL enough, but I'm not even sure I'm reading right what the PHPStorm warning is trying to tell me...
I found the code from here:
Note: I'm just testing it; I didn't write it, I'm just using it to test something. Don't worry about what I'm testing, or why or all of the surrounding things that could possibly be asked about. I just am not sure how to read the warning PHPStorm is giving me.
Note 2: Thank you.