NoSQL Databases

In the previous section, we looked at how SQL databases are used in the industry, along with some examples. However, with all the great things SQL databases can do, there is still significant room for improvement when it comes to dealing with complex and huge data with quick retrieval requirements. The times before and after NoSQL databases were created can be seen in the following diagram:

Figure 5.34: NoSQL database formats

These NoSQL databases evolved because of the fundamental limitations of SQL databases. The data in almost every sector has grown exponentially over time and the variety of usage has also expanded. Earlier, databases were limited to enterprise resource systems, research projects, telecommunications, and so on, but today, new domains have emerged with huge data in a variety of formats, such as social media and profiling millions of users, oil and gas, with billions of binary records, e-commerce, and life sciences. Because...