Oracle PL SQL Job Support - IDESTRAININGS

The Blocks are basic programming language units in PL/SQL programming language. There are two types of Blocks in PL/SQL.

1. Anonymous Block
2. Named Block

The Both types of Oracle PL SQL Job Support Blocks are further divided into 3 different sections which are, the Declaration section, the execution section, and the Exception-handling section. The Execution Section is the only mandatory section of blocks where as Declaration and Exception Handling sections are optional.

Declaration section is the part of first place in the section of PL/SQL block, it include definition of PL/SQL identifiers such as variables, Constants, cursors and so on. This is the place where all local variables used in the program are defined documented. It is also declaration sections always start with keyword Declare.

Execution section is containing executable statements that allow manipulating the variables that have been confirmed in the declaration section. The execution section of any PL/SQL block for all time begins with the keyword BEGIN and ends with the keyword END. This is the only compulsory section in PL/SQL block. This section always supports total DML commands and SQL*PLUS build-in functions. It also supports DDL commands using native dynamic SQL (NDS) or DMBS_SQL built-in package.

Exception-Handling section is which is optional just like the declaration section. This section contains statements that are executed when a runtime error occurs within the block. We can say all exception handling code goes here.

Naming rules for PL/SQL variables:

The variable in PL/SQL must follow some naming rules like other programming languages.

• The variable_name should not exceed 30 characters.
• The name of the variable must begin with ASCII letter. The PL/SQL is not case sensitive so it could be either lowercase or uppercase. For example: v_data and V_DATA refer to the same variables.
• You should make your variable easy to read and understand, after the first character, it may be any number, underscore (_) or dollar sign ($).
• NOT NULL is an optional specification on the variable

What is Oracle PLSQL?

Oracle PL/SQL is an extension of SQL language, designed for seamless processing of SQL statements enhancing the security, portability, and robustness of the database. This PL/SQL online programming course explains some important aspect of PL SQL language like block structure, data types, packages, triggers, exception handling, etc.

What are Oracle PL SQL Job Support Packages in Oracle Database?

The Packages are saved libraries in the database, these packages allow us to group related PL/SQL objects and each PL/SQL object have under one name. The simple words packages are logical groups of related PL/SQL objects. Packages are named PL/SQL Blocks which means they are permanently stored into the Database schema. That can be referenced or reused by your program. A Package can old multiple database objects such as Stored Procedures, PL/SQL Functions, Database Cursors, Type declarations and Variables. All the objects included into a package are collectively called Package elements.

Why Use PL/SQL?

An application that uses Oracle Database is worthless unless only correct and complete data is persisted. The time-honored way to ensure this is to expose the database only via an interface that hides the implementation details — the tables and the SQL statements that operate on these. This approach is generally called the thick database paradigm, because PL/SQL subprograms inside the database issue the SQL statements from code that implements the surrounding business logic; and because the data can be changed and viewed only through a PL/SQL interface

Architecture of Oracle PL SQL Job Support Package:

Oracle PL SQL Job Support Package is divided into two parts, The Package Specification also known as header and The Package Body. This element is saved individually in the data dictionary. The Package Specification is the necessary part whereas the package body is non-compulsory, but it is good put into practice to make available the body to the package. Package specification is also called as the package header. It is the section what we given the declaration of all the package elements. The given elements we declare here in this section are openly presented and can be referenced outer of the package. At IDESTRAININGS we also provide Job Support for SQL from our real-time experts.

Benefits of Oracle PL SQL Job Support:

• Performance benefit it described about the request whenever you will be writing PL/SQL block, it will give a single request for the complete block. It will give you a performance benefit.
• Modularization is different set of tasks we can create the different blocks, it will sometimes named or sometimes anonymous. Each particular block would be performing separate tasks.
• Portability means if you are running a PL/SQL block in one machine, you can easily take that particular code and run in some other system as well it will be having no problem. If in both the terminals you are accessing the same database.
• Programming feature is the iteration statements, conditional statements, loops and arrays, functions, everything here like a programming language.
• Exception handling means if you have written your program correctly definitely it will get executed, but during the execution it may get failed because of any reasons.