Chapter 1: Introduction to Databases

Data has become increasingly important over the last few years. Almost all applications use data, whether the application is a Customer Relationship Management (CRM) system at work or a social media app on your phone. All that data is stored in databases. Since the 1980s, almost all those databases have been relational databases. Nowadays, with the advent of big data, there are different ways to store and process huge amounts of data. Some of them can be classified as so-called NoSQL databases. NoSQL stands for "not only" SQL. This means that we are seeing other types of databases emerge and being used alongside relational databases. NoSQL databases are important in the area of big data. The "SQL" in NoSQL ...

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