SQL Cookbook
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Numar articol:187740336
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Preț:248,00 Lei
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Anuntul a expirat la:12.08.2021, 16:12
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Specificatii
You know the rudiments of the SQL query language, yet you feel you
aren't taking full advantage of SQL's expressive power. You'd like
to learn how to do more work with SQL inside the database before
pushing data across the network to your applications. You'd like to
take your SQL skills to the next level.Let's face it, SQL is a
deceptively simple language to learn, and many database developers
never go far beyond the simple statement: SELECT columns FROM table
WHERE conditions. But there is so much more you can do with the
language. In the SQL Cookbook, experienced SQL developer Anthony
Molinaro shares his favorite SQL techniques and features. You'll
learn about: Window functions, arguably the most significant
enhancement to SQL in the past decade. If you're not using these,
you're missing outPowerful, database-specific features such as SQL
Server's PIVOT and UNPIVOT operators, Oracle's MODEL clause, and
PostgreSQL's very useful GENERATE_SERIES functionPivoting rows into
columns, reverse-pivoting columns into rows, using pivoting to
facilitate inter-row calculations, and double-pivoting a result
setBucketization, and why you should never use that term in
Brooklyn.How to create histograms, summarize data into buckets,
perform aggregations over a moving range of values, generate
running-totals and subtotals, and other advanced, data warehousing
techniquesThe technique of walking a string, which allows you to
use SQL to parse through the characters, words, or delimited
elements of a stringWritten in O'Reilly's popular
Problem/Solution/Discussion style, the SQL Cookbook is sure to
please. Anthony's credo is: When it comes down to it, we all go to
work, we all have bills to pay, and we all want to go home at a
reasonable time and enjoy what's still available of our days. The
SQL Cookbook moves quickly from problem to solution, saving you
time each step of the way.
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