anothersmurf:
Yeah, perldoc -f join is one of those *really convenient* functions. Before I learned it, I was always doing things like adding a trailing comma to everything, and then clipping off the last one. But I didn't notice that I was always doing things like that until I found the join function. Now I look back and think "Why didn't I notice that and write a join equivalent for <language X>? Ah, well, you can never notice *all* the assumptions you make...
As someone else has already remarked, placeholders can't be used *everywhere*, but they're still very convenient. When you can't use them, and need to build some dynamic SQL on the fly, be sure to check out $DB->quote($data) to ensure that the data is properly quoted. That'll go a long way in reducing the attack surface of your application.
...roboticus
When your only tool is a hammer, all problems look like your thumb.
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