title: Why Banks or Financial Companies prefer Oracle than other RDBMS for their "Core" systems?
body: <p>I'd like to know why most Banks or Financial companies prefer Oracle than other RDBMS for their core systems (the absolutely minimum features that a Bank must support). I found a few answers that didn't satisfy me. For example: Oracle has more features. But features for what? Can't you implement that in application level if you were not using Oracle? </p>
  
  <p>Could someone please describe a bit more technical but still on high-level overview of what the bank needs and how Oracle would solve it and the others can't or don't have the features yet?</p>
  
  <p>Minor question: would you use ORM if you have to develop a banking solution?</p>
  
  <p>I came from the web-app (web 2.0) crowd who normally hear news about MySQL, PostgreSQL or even key-value/column-oriented storage solution. I have almost zero knowledge on how Banks or Financial companies operates from technical perspective. </p>
  
  <p>Thank you,
  Ed</p>