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- Refer back to the queries in <a class="xref" href="tutorial-join.html" title="2.6. Joins Between Tables">Section 2.6</a>.
- Suppose the combined listing of weather records and city location
- is of particular interest to your application, but you do not want
- to type the query each time you need it. You can create a
- <em class="firstterm">view</em> over the query, which gives a name to
- the query that you can refer to like an ordinary table:
-
- </p><pre class="programlisting">
- CREATE VIEW myview AS
- SELECT city, temp_lo, temp_hi, prcp, date, location
- FROM weather, cities
- WHERE city = name;
-
- SELECT * FROM myview;
- </pre><p>
- </p><p>
- Making liberal use of views is a key aspect of good SQL database
- design. Views allow you to encapsulate the details of the
- structure of your tables, which might change as your application
- evolves, behind consistent interfaces.
- </p><p>
- Views can be used in almost any place a real table can be used.
- Building views upon other views is not uncommon.
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