Also: don't make assumptions about how you believe a database works, just because you've used another one (or another version of the same). And measure every o

Also: don't make assumptions about how you believe a database works, just because you've used another one (or another version of the same). And measure every optimization you make, too :) I saw someone doing an optimization that should have accelerated the processing, only to discover once in production it was 4x slower.