The relational database management system was a breakthrough when it first appeared about 40 years ago. A relational database puts power into a user’s hands. Few assumptions are needed about how data is related or how it is to be extracted. Data can then be viewed in a variety of ways, each one illustrating different connections or correlations. This power, history, and a little user inertia have led to the RDBMS being implanted and used in practically every sector of business today.
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