Oracle PL/SQL

About Oracle PL/SQL

PL/SQL is short for “procedural language extensions to SQL”.  Essentially, this is an extension of the structure queries language (SQL) which was developed by an Oracle company.  This language allows developers to write the code in the procedure format.  It combines the SQL capability to manipulate data with the procedural language capability to create the full function SQL queries.  PL/SQL allows developers to command the compiler what to do (via SQL) and how to do this (viatheprocedural way).

What may Oracle PL/SQL Architecture Consists of ?

PL/SQL blocks
PL/SQL engine
Database server
Procedural extension of the SQL language possesses a set of advantages among which one may distinguish the followings:
Better performance as SQL is fulfilled entirely, not by the individual instructions;
High productivity;
Full integration with SQL;
High mobility;
High protection level;
Maintaining the object-oriented programming.
PL/SQL may be designated as a third-generation programming language (3GL) such as Pascal and C++.  It is an encapsulated SQL language.  The PL/SQL language supports the complex data structure.  For creating an agile development environment, there is a restore function of certain subsystems.  The scope in PL/SQL is defined by the strict rules.

 

What you will learn in this Training Oracle PL/SQL Course?

Introduction to Oracle 11g database
Manage, design, build database applications
PL/SQL sections – Declaration, Execution and Exception Handling
Major SQL command groups namely DDL, DML, DCL, TCL
Oracle DBA roles and responsibilities
Database integrity constraints, schema management and database structural definitions
Learn about security, data backup and recovery
Install, configure and manage the Oracle Cloud

 

Who should take this Training Oracle PL/SQL Course?

Software Developers, Database Administrators, BI and Data Warehousing professionals
Project Managers, Architects, SQL and analytics professionals

 

What are the prerequisites for taking this Oracle PL/SQL Training Course?

As long as I know there are no prerequisite for learning any SQL languages like Oracle or MySQL.  You won’t find it that difficult to grasp the concept of SQL.  It’s pretty straight forward since it’s same like English language.
But to learn PL/SQL, it would be nice if you know some programming concepts used in C language.  Again it’s not necessary.

 

Why should you take this Oracle PL/SQL Course?

Large software systems must be built from modules.  A module hides its implementation behind an interface that exposes its functionality.  This is computer science’s most famous principle.  For applications that use an Oracle Database, the database is, of course, one of the modules.  The implementation details are the tables and the SQL statements that manipulate them.  These are hidden behind a PL/SQL interface.  This is the Thick Database paradigm: select, insert, update, delete, merge, commit, and rollback are issued only from database PL/SQL. Developers and end-users of applications built this way are happy with their correctness, maintainability, security, and performance.

What is the scope of a Oracle PL/SQL Developer in the current IT industry?

Notice the number above. Now even if 5–10% jobs make sense to you, there are 500 to 1100 jobs available right now.
Now, in order to make your position better, learn more about SQL analytics and most importantly some knowledge on the domain you are working on (like Banking, Finance, HR, Supply Chain etc).
PL/SQL jobs are still in demand, but number of applicants will also be more. So expect tough competition.

 

What is the future of Oracle PL/SQL Developer?

SQL is something that’s gonna be there till the end of the world. Even with the rise of Big Data Systems, relational database systems have not lost importance.  Also RDBMS companies are rolling out Big Data flavored features like scaling, distributed processing, data warehousing to handle large scale structured data with the current implementations of Relational Databases.  So the point is SQL is a very good place to start with and it has a great future.

 

Oracle Certification Training

1Z0-061 Oracle Database 12c: SQL Fundamentals
1Z0-047 Oracle Database SQL Expert
1Z0-051 Oracle Database 11g: SQL Fundamentals I
1Z0-147 Program with PL/SQL
1Z0-144 Oracle Database 11g: Program with PL/SQL
1Z0-146 Oracle Database 11g: Advanced PL/SQL

 

Oracle PL/SQL Course Outline

1. Introduction to PL/SQL

  • PL/SQL Overview
  • Structure Of PL/SQL
  • Benefits of PL/SQL Subprograms
  • Overview of the Types of PL/SQL blocks
  • Create a Simple Anonymous Block
  • Generate Output from a PL/SQL Block

2. PL/SQL Identifiers

  • List the different Types of Identifiers in a PL/SQL subprogram
  • Usage of the Declarative Section to define Identifiers
  • Use variables to store data
  • Identify Scalar Data Types
  • The %TYPE Attribute
  • What are Bind Variables?
  • Sequences in PL/SQL Expressions

3. Write Executable Statements

  • Describe Basic PL/SQL Block Syntax Guidelines
  • Comment Code
  • Deployment of SQL Functions in PL/SQL
  • How to convert Data Types?
  • Nested Blocks
  • Identify the Operators in PL/SQL

4. Interaction with the Oracle Server

  • Invoke SELECT Statements in PL/SQL to Retrieve data
  • Data Manipulation in the Server Using PL/SQL
  • SQL Cursor concept
  • Usage of SQL Cursor Attributes to Obtain Feedback on DML
  • Save and Discard Transactions

5. Control Structures

  • Conditional processing Using IF Statements
  • Conditional processing Using CASE Statements
  • Use simple Loop Statement
  • Use While Loop Statement
  • Use For Loop Statement
  • Describe the Continue Statement
  • Describe the GOTO Statements

6. Composite Data Types

  • Use PL/SQL Records
  • The %ROWTYPE Attribute
  • Insert and Update with PL/SQL Records
  • Associative Arrays (INDEX BY Tables)
  • Examine INDEX BY Table Methods
  • Use INDEX BY Table of Records

7. Explicit Cursors

  • What are Explicit Cursors?
  • Declare the Cursor
  • Open the Cursor
  • Fetch data from the Cursor
  • Close the Cursor
  • Cursor FOR loop
  • Explicit Cursor Attributes
  • FOR UPDATE Clause and WHERE CURRENT Clause

8. Exception Handling

  • What is Exception
  • Understand Exceptions
  • Handle Exceptions with PL/SQL
  • Trap Predefined Oracle Server Errors
  • Trap Non-Predefined Oracle Server Errors
  • Trap User-Defined Exceptions
  • Propagate Exceptions
  • The SQLCODE and SQLERRM in PL/SQL
  • RAISE_APPLICATION_ERROR Procedure

9. Stored Procedures and Functions

  • What Is Procedure and Function
  • Understand Stored Procedures and Functions
  • Differentiate between anonymous blocks and subprograms
  • Create a Simple Procedure
  • Create a Simple Procedure with IN parameter
  • Create a Simple Procedure with OUT parameter
  • Create a Simple Procedure with IN OUT parameter
  • Create a Simple Function
  • Execute a Simple Procedure
  • Execute a Simple Function

10. Create Stored Procedures

  • Create a Modularized and Layered Subprogram Design
  • Modularize Development With PL/SQL Blocks
  • Describe the PL/SQL Execution Environment
  • Identity the benefits of Using PL/SQL Subprograms
  • List the differences Between Anonymous Blocks and Subprograms
  • Create, Call, and Remove Stored Procedures Using the CREATE Command and SQL Developer
  • Implement Procedures Parameters and Parameters Modes
  • View Procedures Information Using the Data Dictionary Views and SQL Developer

11. Create Stored Functions

  • Create, Call, and Remove a Stored Function Using the CREATE Command and SQL Developer
  • Identity the advantages of Using Stored Functions in SQL Statements
  • List the steps to create a stored function
  • Implement User-Defined Functions in SQL Statements
  • Identity the restrictions when calling Functions from SQL statements
  • Control Side Effects when calling Functions from SQL Expressions
  • View Functions Information

12. Create Packages

  • Identity the advantages of Packages
  • Describe Packages
  • List the components of a Package
  • Develop a Package
  • How to enable visibility of a Package’s components?
  • Create the Package Specification and Body Using the SQL CREATE Statement and SQL Developer
  • Invoke Package Constructs
  • Private and Public Package Level
  • Calling Package Functions and Procedures
  • View PL/SQL Source Code Using the Data Dictionary

13. Packages

  • Overloading Subprograms in PL/SQL
  • Use the STANDARD Package
  • Use Forward Declarations to Solve Illegal Procedure Reference
  • Implement Package Functions in SQL and Restrictions
  • Persistent State of Packages
  • Persistent State of a Package Cursor
  • Control Side Effects of PL/SQL Subprograms
  • Invoke PL/SQL Tables of Records in Packages