1. The Relational Database
A fish must swim three times—in water, in butter, and in wine.
—POLISH PROVERB
Topics Covered in This Chapter
Relational Database Management Systems
The relational database has been in existence for more than 40 years. It spawned a multibillion-dollar industry, is the most widely used type of database in the world today, and is an essential part of our everyday lives. It is very likely that you are using a relational database every time you purchase goods online or at a local store, make travel plans with your travel agent, check out books at the library, or make a purchase ...
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