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<h1><font color="black"><a name="htoc168">Chapter&nbsp;14</a>&nbsp;&nbsp;Using databases and Structured Query Language (SQL)</font></h1>
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<h2><font color="black"><a name="htoc169">14.1</a>&nbsp;&nbsp;What is a database?</font></h2>
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<font color="black">A <b>database</b> is a file that is organized for storing data.
Most databases are organized like a dictionary in the sense
that they map from keys to values. The biggest