For all the buzz about trendy IT techniques, data processing is
still at the core of our systems, especially now that enterprises
all over the world are confronted with exploding volumes of data.
Database performance has become a major headache, and most IT
departments believe that developers should provide simple SQL code
to solve immediate problems and let DBAs tune any "bad SQL" later.
In "The Art of SQL," author and SQL expert Stephane Faroult
argues that this "safe approach" only leads to disaster. His
insightful book, named after Art of War by Sun Tzu, contends that
writing quick inefficient code is sweeping the dirt under the rug.
SQL code may run for 5 to 10 years, surviving several major
releases of the database management system and on several
generations of hardware. The code must be fast and sound from the
start, and that requires a firm understanding of SQL and relational
theory.
"The Art of SQL" offers best practices that teach experienced
SQL users to focus on strategy rather than specifics. Faroult's
approach takes a page from Sun Tzu's classic treatise by viewing
database design as a military campaign. You need knowledge, skills,
and talent. Talent can't be taught, but every strategist from Sun
Tzu to modern-day generals believed that it can be nurtured through
the experience of others. They passed on their experience acquired
in the field through basic principles that served as guiding stars
amid the sound and fury of battle. This is what Faroult does with
SQL.
Like a successful battle plan, good architectural choices are
based on contingencies. What if the volume of this or that table
increases unexpectedly? What if, following a merger, the numberof
users doubles? What if you want to keep several years of data
online? Faroult's way of looking at SQL performance may be
unconventional and unique, but he's deadly serious about writing
good SQL and using SQL well. "The Art of SQL" is not a cookbook,
listing problems and giving recipes. The aim is to get you-and your
manager-to raise good questions.
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