What is Relational Database?

What is Relational Database?

A relational database is a type of database that stores and provides access to data points that are related to one another. … The columns of the table hold attributes of the data, and each record usually has a value for each attribute, making it easy to establish the relationships among data points.




How many libraries are there in the world? According to the International Federation of Library Associations and Institutions, there are more than 569.6 thousand libraries in the world. The most “”library”” continents are Europe (more than 440 thousand libraries, their branches and branches – that is, places where you can borrow a book or magazine) and North America(more than 125 thousand).

Least of all libraries in Africa – only 1.2 thousand library departments. About 807 thousand people work in the libraries of the world (363 thousand in North America, 326 thousand in Europe, 242 thousand in Asia). The world spends about $ 8.7 trillion on library maintenance. in year. The total length of bookshelves in the world’s libraries is approximately 15,000 km. At the same time, libraries of Asia have the longest shelves – 9 thousand km. For Europe, this figure is 350 km, for North America – 750 km. According to this indicator, South America is in last place in the world – 25 km.


Library subscribers are approximately 2.5 billion people (according to estimates by the US Census Bureau, the current population of the globe exceeds 6.5 billion). According to this indicator, Europe is the undisputed leader – 1.8 billion people. In second place is Asia (215 million), in third place is North America (77 million).

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