bpatin: did you mean PostgreSQL over SQL? I agree PostgreSQL has more mature capbilities than MySQL, but licensing issues?

As far as this topic goes, I think the onus is on the developer to understand the difference in database applications and platforms to achieve the best performance in his/her application. It is the developer's responsibility to understand the technology they are manipulating. Luckily the basic principles of databases apply to most and they are not going to have to start from scratch, but they will need to find out the differences and learn how to best utilize the technology at hand.

just my .02