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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
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Produktbeschreibung
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 out

- Powerful, database-specific features such as SQL Server's PIVOT and UNPIVOT operators, Oracle's MODEL clause, and PostgreSQL's very useful GENERATE_SERIES function

- Pivoting rows into columns, reverse-pivoting columns into rows, using pivoting to facilitate inter-row calculations, and double-pivoting a result set

- Bucketization, 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 techniques

- The technique of walking a string, which allows you to use SQL to parse through the characters, words, or delimited elements of a string

Written 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.
Autorenporträt
Anthony Molinaro is a database developer at Wireless Generation. His interests include databases, databases, and, oh yeah... databases. He currently resides in Baltimore, Maryland with Georgia, his fiancee and favorite periodontist.
Rezensionen
"Nach dem Grundschema Problem - Lösung - Diskussion bietet es 163 Rezepte für den Datenbankalltag. Sofern es sich um Speziallösungen handelt, werden sie für fünf verschiedene Systeme geliefert[...]. Das flach gegliederte Inhaltsverzeichnis, ein übersichtliches Seitenlayout und ein umfangreicher Index erleichtern das Auffinden des gewünschten Themas. [...]

Von harmlos anmutenden Aufgaben [...] geht es bis hin zu wundersamen Gebilden, die mit einer halben Seite SQL-Code komplizierte Aufgaben des Controlling und Warehousing lösen und dabei die Verwendung von Applikationscode und Middleware weitgehend überflüssig machen. Wer weiß schon auf Anhieb, wie man mit SQL-Abfragen horizontale und vertikale Histogramme erzeugt? Oder Baumstrukturen zur hierarchischen Darstellung von Tabelleninhalten? Bei Molinaro ist es nachzulesen.Es besteht keine Notwendigkeit, jede Aufgabe mit SQL-Mitteln zu lösen. Darauf weist der Autor auch hin. Doch es ist erstaunlich, welche Möglichkeiten in dieser scheinbar simplen Sprache stecken. Fazit: Eine Fundgrube für Datenbank-Professionals." - Bernhard Röhrig, Linux Magazin 04/06