[tomjen3]

Support. You can properly find some solution to your issue with postgres online. Oracle can send an Oracle certified engineer who can solve your problem.

Consistency. Your enterprise depends on terabytes of hyper valuable information (Wallmart with their sales data), can you guarantee that you won't end up with corruption issues? Or that the next version will work with your system too?

That said as long as you make less than 20 mil/year, Oracle isn't likely to be the best solution.

Just a quick question: which engine do you use for your MySQL system?

[derrickpetzold]

InnoDB. I understand your support viewpoint but both of those dbs are opensource thereby leaving support open. From what I understand when the support comes into play is when you can sue the other party for not providing the service expected but there is company support for mysql and postgres so that still leaves me in the dark and I have never experienced corruption issues with either. Though my db experience is limited and I don't claim to be an expert.

[StavrosK]

I had experienced db corruption with MySQL years ago, when the disk became full. To be fair, I think it was MyISAM.