Practical Oracle Sql - Berg Hansen Kim | Libro Apress 02/2020 - HOEPLI.it


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berg hansen kim - practical oracle sql

Practical Oracle SQL Mastering the Full Power of Oracle Database




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Dettagli

Genere:Libro
Lingua: Inglese
Editore:

Apress

Pubblicazione: 02/2020
Edizione: 1st ed.





Sommario

Part I. Core SQL
1. Correlating Inline Views
2. Pitfalls of Set Operations
3. Divide and Conquer with Subquery Factoring
4. Tree Calculations with Recursion
5. Functions Defined Within SQL
6. Iterative Calculations with Multidimensional Data
7. Unpivoting Columns to Rows
8. Pivoting Rows to Columns
9. Splitting Delimited Text
10. Creating Delimited Text

Part II. Analytic Functions
11. Analytic Partitions, Ordering and Windows
12. Answering Top-N Questions
13. Ordered Subsets with Rolling Sums
14. Analyzing Activity Logs with Lead
15. Forecasting with Linear Regression
16. Rolling Sums to Forecast Reaching Minimums

Part III. Row Pattern Matching
17. Up and  Down Patterns
18. Grouping Data Through Patterns
19. Merging Date Ranges
20. Finding Abnormal Peaks
21. Bin Fitting
22. Counting Children in Trees





Trama

Write powerful queries using as much of the feature-rich Oracle SQL language as possible, progressing beyond the simple queries of basic SQL as standardized in SQL-92.

Both standard SQL and Oracle’s own extensions to the language have progressed far over the decades in terms of how much you can work with your data in a single, albeit sometimes complex, SQL statement. If you already know the basics of SQL, this book provides many examples of how to write even more advanced SQL to huge benefit in your applications, such as:
  • Pivoting rows to columns and columns to rows
  • Recursion in SQL with MODEL and WITH clauses
  • Answering Top-N questions
  • Forecasting with linear regressions
  • Row pattern matching to group or distribute rows
  • Using MATCH_RECOGNIZE as a row processing engine
The process of starting from simpler statements in SQL, and gradually working those statements stepwise into more complex statements that deliver powerful results, is covered in each example. By trying out the recipes and examples for yourself, you will put together the building blocks into powerful SQL statements that will make your application run circles around your competitors.


What You Will Learn
  • Take full advantage of advanced and modern features in Oracle SQL
  • Recognize when modern SQL constructs can help create better applications
  • Improve SQL query building skills through stepwise refinement
  • Apply set-based thinking to process more data in fewer queries
  • Make cross-row calculations with analytic functions
  • Search for patterns across multiple rows using row pattern matching
  • Break complex calculations into smaller steps with subquery factoring

Who This Book Is For

Oracle Database developers who already know some SQL, but rarely use features of the language beyond the SQL-92 standard. And it is for developers who would like to apply the more modern features of Oracle SQL, but don’t know where to start. The book also is for those who want to write increasingly complex queries in a stepwise and understandable manner. Experienced developers will use the book to develop more efficient queries using the advanced features of the Oracle SQL language.





Autore

Kim Berg Hansen is a database developer from Middelfart in Denmark. As a youngster he originally wanted to work with electronics, and he tried computer programming and discovered that the programs he wrote worked well—unlike the electronics projects he soldered that often failed. This led to a VIC-20 with 5 kilobytes RAM and many hours programming in Commodore Basic.

Having discovered his talent, Kim financed computer science studies at Odense University with a summer job as sheriff of Legoredo, while learning methodology and programming in Modula-2 and C. From there he moved into consulting as a developer making customizations to ERP software. That gave him his first introduction to Oracle SQL and PL/SQL, with which he has worked extensively since the year 2000.

His professional passion is to work with data inside the database utilizing the SQL language to the fullest to achieve the best application experience for his application users. With a background fitting programs into 5 KB RAM, Kim hates to waste computing resources unnecessarily.

Kim shares his experience and knowledge by blogging at the kibeha.dk website, presenting at various Oracle User Group conferences, and being the SQL quizmaster at the Oracle Dev Gym. His motivation comes from peers who say “now I understand” after his explanations, and from end users who “can’t live without” his application coding. He is a certified Oracle OCE in SQL, and an Oracle ACE Director. 

Outside the coding world, Kim is married, loves to cook, and is a card-carrying member of the Danish Beer Enthusiasts Association.










Altre Informazioni

ISBN:

9781484256169

Condizione: Nuovo
Dimensioni: 254 x 178 mm Ø 913 gr
Formato: Brossura
Illustration Notes:72 Illustrations, black and white
Pagine Arabe: 460
Pagine Romane: xxiii






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