Which two statements are true about associative arrays?
Associative arrays can have negative subscripts.
Associative arrays are always dense collections.
Associative arrays don't need initialization in a PL/SQL block.
The upper limit of associative arrays can be dynamically modified.
Which of the following statements is true about nested tables?
Nested tables are stored in a segment different from that of the parent table.
Nested table columns can have string subscripts
Nested tables can grow dynamically up to any extent.
A database column of the nested table collection type can be separately queried by its storage name.
Only varrays can have sequential numbers as subscripts.
True
False
Which of the following associative array declarations is/are correct?
DECLARE TYPE T1 IS TABLE OF NUMBER INDEX BY BOOLEAN; TYPE T2 IS TABLE OF VARCHAR2(10) INDEX BY NUMBER; TYPE T3 IS TABLE OF DATE INDEX BY SIGNTYPE; TYPE T4 IS TABLE OF EMPLOYEES%ROWTYPE INDEX BY POSITIVE; BEGIN … … END;
T1
T2
T3
T4...
Oracle Advanced PL/SQL Developer Professional Guide
By :
Oracle Advanced PL/SQL Developer Professional Guide
By:
Overview of this book
PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension language for SQL and the Oracle relational database. Server-side PL/SQL is stored and compiled in the Oracle Database and runs within the Oracle executable. With this guide Oracle developers can work towards accomplishing Oracle 11g Advanced PL/SQL Professional certification, which is the second milestone for developers working at the Associate level. The Oracle Advanced PL/SQL Developer Professional Guide helps you master advanced PL/SQL concepts. Besides the clear and precise explanation on advanced topics, it also contains example code and demonstrations, which gives a sense of application and usage to readers.The book gives a deep insight that will help transform readers from mid-level programmers to professional database developers. It aims to cover the advanced features of PL/SQL for designing and optimizing PL/SQL code.This book starts with an overview of PL/SQL as the programming database language and outlines the benefits and characteristics of the language. The book then covers the advanced features that include PL/SQL code writing using collections, tuning recommendations using result caching, implementing VPD to enforce row level security, and much more. Apart from programming, the book also dives deep into the usage of the development tool SQL Developer, employing best practices in database environments and safeguarding the vulnerable areas in PL/SQL code to avoid code injection.
Table of Contents (22 chapters)
Oracle Advanced PL/SQL Developer Professional Guide
Credits
Foreword
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
Overview of PL/SQL Programming Concepts
Designing PL/SQL Code
Using Collections
Using Advanced Interface Methods
Implementing VPD with Fine Grained Access Control
Working with Large Objects
Using SecureFile LOBs
Compiling and Tuning to Improve Performance
Caching to Improve Performance
Analyzing PL/SQL Code
Profiling and Tracing PL/SQL Code
Safeguarding PL/SQL Code against SQL Injection Attacks
Answers to Practice Questions
Index
Customer Reviews