Whether the acronym “NoSQL” stands for “not only SQL,” as some database architects content, or literally “no SQL,” up until this month, it has been taken to imply “no Oracle.” One of the many hallmarks of Oracle’s SQL RDBMS technology, historically, has been consistency — the notion that every client perceives the same view of the data at any one time. Maintaining consistency, among other factors, incurs latency issues as database sizes scale with social media into the stratosphere.
NoSQL databases scale up, but typically at the expense of consistency, which is something you wouldn’t think Oracle would want to give up.