jfruh writes: One of the biggest losers in the rise of lightweight big data databases like NoSQL and Hadoop has been Oracle, whose lucrative business lies on selling SQL tools. Proving that if you can't beat 'em you should join 'em, Oracle is now offering tools that allow you to query multiple kinds of databases with a single SQL query. The hope is that Oracle's SQL products will still remain the default, or at least in the mix.
A method of solution is perfect if we can forsee from the start,
and even prove, that following that method we shall attain our aim.