7. Oracle SecureFiles | Advanced Oracle PL/SQL Developer's Guide (Second Edition)

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Advanced Oracle PL/SQL Developer's Guide (Second Edition) - Second Edition

By : Saurabh K. Gupta

4.9 (9)

Advanced Oracle PL/SQL Developer's Guide (Second Edition)

4.9 (9)

By: Saurabh K. Gupta

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.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Overview of PL/SQL Programming Concepts

1. Overview of PL/SQL Programming Concepts

Introduction to PL/SQL

Cursors – an overview

Exception handling in PL/SQL

Creating stored procedures

Functions

A PL/SQL package

Oracle Database 12c enhancements to PL/SQL subprograms

Managing database dependencies

Reviewing Oracle-supplied packages

Oracle SQL Developer

Summary

Practice exercise

2. Oracle 12c SQL and PL/SQL New Features

2. Oracle 12c SQL and PL/SQL New Features

Database consolidation and the new Multitenant architecture

Oracle 12c SQL and PL/SQL new features

The Oracle Database 12c (12.1.0.2) In-Memory option

Summary

3. Designing PL/SQL Code

3. Designing PL/SQL Code

Cursor structures

Cursor variables

Implicit statement results in Oracle Database 12c

Subtypes

Summary

Practice exercise

4. Using Collections

4. Using Collections

Introduction to collections

Collection types

Associative arrays

Nested tables

Varray

Comparing the collection types

Oracle 12c enhancements to collections

PL/SQL collection methods

Summary

Practice exercise

5. Using Advanced Interface Methods

5. Using Advanced Interface Methods

Overview of External Procedures

Components of external procedure execution flow

Executing external C programs from PL/SQL

Securing External Procedures with Oracle Database 12c

Executing Java programs from PL/SQL

Summary

Practice exercise

6. Virtual Private Database

6. Virtual Private Database

Oracle Database Security overview

Fine-Grained Access Control

Virtual Private Database

Virtual Private Database metadata

Oracle Database 12c Security enhancements

Summary

Practice exercise

7. Oracle SecureFiles

7. Oracle SecureFiles

Introduction to Large Objects

LOB data types in Oracle

Oracle SecureFiles

Working with LOBs

Migrating LONG to LOBs

Migrating BasicFiles to SecureFiles

Oracle Database 12c enhancements to SecureFiles

Summary

Practice exercise

8. Tuning the PL/SQL Code

8. Tuning the PL/SQL Code

The PL/SQL Compiler

Native and interpreted compilation techniques

Tuning PL/SQL code

Summary

Practice exercise

9. Result Cache

9. Result Cache

Oracle Database 11g Result Cache

SQL query Result Cache

PL/SQL Function Result Cache

OCI Client results cache

The DBMS_RESULT_CACHE package

Result cache in Real Application Clusters

Summary

Practice exercise

10. Analyzing, Profiling, and Tracing PL/SQL Code

10. Analyzing, Profiling, and Tracing PL/SQL Code

A sample PL/SQL program

Tracking PL/SQL coding information

Determining identifier types and usages

The DBMS_METADATA package

Tracing PL/SQL programs using DBMS_TRACE

Profiling PL/SQL code

Summary

Practice exercise

11. Safeguarding PL/SQL Code against SQL injection

11. Safeguarding PL/SQL Code against SQL injection

What is SQL injection?

Preventing SQL injection attacks

Testing the code for SQL injection flaws

Summary

Practice exercise

12. Working with Oracle SQL Developer

12. Working with Oracle SQL Developer

An overview of SQL Developer

Getting started with SQL Developer

SQL Developer 4.0 and 4.1 New Features

Summary

Index

Index

Practice exercise

Internal LOBs can be used as attributes of a user-defined data type:
1. True.
2. False.
Internal LOBs cannot be passed as parameters to PL/SQL subprograms:
1. True.
2. False.
Internal LOBs can be stored in a tablespace that is different from the tablespace that stores the table containing the LOB column:
1. True.
2. False.
You issue the following command to create a table called LOB_STORE:
```
CREATE TABLE LOB_store
(LOB_id NUMBER(3),
photo BLOB DEFAULT EMPTY_CLOB(),
cv CLOB DEFAULT NULL,
ext_file BFILE DEFAULT NULL)
/
```
Identify the issue in this script:
1. The table is created successfully.
2. It generates an error because a BLOB column cannot be initialized with EMPTY_CLOB().
3. It generates an error because DEFAULT cannot be set to NULL for a CLOB column during table creation.
4. It generates an error because DEFAULT cannot be set to NULL for a BFILE column during table creation.
Identify the correct statements relating to the initialization of LOBs:
1. An internal LOB cannot be initialized in the CREATE TABLE statement...

CONTINUE READING

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Advanced Oracle PL/SQL Developer's Guide (Second Edition)

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