To be honest on point #6, if I ever do inline MySQL, which I do from time-to-time, even still, then I do use $szQuery merely because it describes what it is, it just doesn't describe the finer details of its content. And I think that's very important.

I could name my query string variables $szLoginQuery but I feel variables shouldn't be so descriptive. When you start having to add many inline queries concurrently - to which would require differently named variables, then I don't think the problem is necessarily the variable naming scheme, but rather the fact that such concurrent queries should be moved off into classes and thus the query variable name can remain nondescript and vague.

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