Sometimes a casual reader may get the impression that NoSQL just makes relational databases old-fashioned. This is very far from the truth. NoSQL is there to cure specific ailments. If you don’t suffer from any of those specific symptoms, the side effects from taking NoSQL medication may cause more pain than relief.
Make sure you check the following paragraph too:
There is no “NoSQL ecosystem” because, by definition, no two NoSQL databases are compatible or will ever be. Be prepared for an uncushioned, bumpy ride. Here are a few things for you to evaluate when checking out NoSQL databases
Original title and link: NoSQL: Don’t Take the Drug Unless You Have the Symptoms (NoSQL databases © myNoSQL)