No personal offense intended, but there seem to be a lot of people who kinda-sorta understand SQL in that way, but run into performance issues because they don'

No personal offense intended, but there seem to be a lot of people who kinda-sorta understand SQL in that way, but run into performance issues because they don't understand important basics (indexing, for one), and are too quick to blame their problems on "SQL not scaling". When I hear people psyched about the whole NoSQL thing but actually quite ignorant about relational databases (like a guy who gave a presentation on CouchDB at a barcamp here last year), I understand why people sometimes call it the "NoMySQL" movement - a lot of the hype seems to come from people whose experience seems couched in PHP+MySQL tutorials, specifically.