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 by dynamically modified.
Which of the following statements is true about nested tables?
Nested tables are stored in a segment different from that of a parent table.
Nested table columns can have string subscripts.
Nested tables can grow dynamically up to any extent.
A database column of 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
Which of the...
Advanced Oracle PL/SQL Developer's Guide (Second Edition) - Second Edition
By :
Advanced Oracle PL/SQL Developer's Guide (Second Edition) - Second Edition
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Overview of this book
Oracle Database is one of the most popular databases and allows users to make efficient use of their resources and to enhance service levels while reducing the IT costs incurred. Oracle Database is sometimes compared with Microsoft SQL Server, however, Oracle Database clearly supersedes SQL server in terms of high availability and addressing planned and unplanned downtime. Oracle PL/SQL provides a rich platform for application developers to code and build scalable database applications and introduces multiple new features and enhancements to improve development experience.
Advanced Oracle PL/SQL Developer's Guide, Second Edition is a handy technical reference for seasoned professionals in the database development space. This book starts with a refresher of fundamental concepts of PL/SQL, such as anonymous block, subprograms, and exceptions, and prepares you for the upcoming advanced concepts. The next chapter introduces you to the new features of Oracle Database 12c, not limited to PL/SQL. In this chapter, you will understand some of the most talked about features such as Multitenant and Database In-Memory. Moving forward, each chapter introduces advanced concepts with the help of demonstrations, and provides you with the latest update from Oracle Database 12c context. This helps you to visualize the pre- and post-applications of a feature over the database releases. By the end of this book, you will have become an expert in PL/SQL programming and will be able to implement advanced concepts of PL/SQL for efficient management of Oracle Database.
Table of Contents (19 chapters)
Advanced Oracle PL/SQL Developer's Guide Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
Overview of PL/SQL Programming Concepts
Oracle 12c SQL and PL/SQL New Features
Designing PL/SQL Code
Using Collections
Using Advanced Interface Methods
Virtual Private Database
Oracle SecureFiles
Tuning the PL/SQL Code
Result Cache
Analyzing, Profiling, and Tracing PL/SQL Code
Safeguarding PL/SQL Code against SQL injection
Working with Oracle SQL Developer
Index
Customer Reviews