Название: Practical Oracle SQL: Mastering the Full Power of Oracle DatabaseАвтор: Kim Berg Hansen
Издательство: Apress
Год: 2020
Формат: true pdf/epub
Страниц: 460
Размер: 14 Mb
Язык: English
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