What is PL SQL –
Since PL/SQL empowers clients to blend SQL articulations with procedural develops, it is conceivable to utilize PL/SQL squares and subprograms to aggregate SQL proclamations before sending them to Oracle for execution. Without PL/SQL, Oracle must process SQL explanations each in turn. In a system domain, this can influence the traffic stream and hinder reaction time. PL/SQL squares can be assembled once and put away in executable structures to improve reaction time.
A Oracle PL/SQL Online Training program that is put away in a database in ordered shape and can be called by name is alluded to as a put-away methodology. A PL/SQL put away method that is verifiably begun when an INSERT, UPDATE or DELETE proclamation is given against a related table is known as a trigger.
PL/SQL squares are characterized by the catchphrases DECLARE, BEGIN, EXCEPTION and END, which partition the square into an explanatory section, an executable part, and a special case fabricating part, individually. The assertion area of the square is utilized to characterize and introduce constants and factors; if a variable isn’t instated, it will default to NULL worth. Squares can be settled and submitted to intuitive apparatuses, as SQL Plus.
PL/SQL is intended to figure and restore a solitary scalar worth or a solitary assortment, for example, a settled table or VARRAY. Clients can make their very own capacities to enhance those gave by Oracle. While capacities can be utilized in a SQL proclamation, systems can’t
What is the difference between Oracle and PL SQL-
Oracle PL/SQL Online Training is an information arranged language for choosing and controlling arrangements of information. PL/SQL is a procedural language to make applications. You don’t ordinarily have a “SQL application”. You ordinarily have an application that utilizations SQL and a social database toward the back. PL/SQL can be the application language simply like Java or PHP can. SQL might be the wellspring of information for your screens, pages, and reports. PL/SQL may be the language you use to manufacture, arrangement and show those screens, site pages, and reports.
The code that makes your program work in PL/SQL. The code that controls the information is SQL DML. The code that makes put away database objects is SQL DDL. DDL accumulates the code that is written in PL/SQL. PL/SQL may call SQL to perform information control. The directions that organization the yield of a device are not identified with the SQL standard or to PL/SQL.
Which software is used for PL SQL programming-
the Environment Setup of Oracle PL/SQL Online Training. PL/SQL isn’t an independent programming language; it is a device inside the Oracle programming condition. SQL Plus is an intuitive instrument that enables you to type SQL and PL/SQL explanations in the direction brief. These directions are then sent to the database for preparing. When the announcements are handled, the outcomes are sent back and showed on screen.
To run PL/SQL programs, you ought to have the Oracle RDBMS Server introduced in your machine. This will deal with the execution of the SQL directions. The latest form of Oracle RDBMS is 11g.
Why do we need PL SQL-
SQL explanations are characterized in terms of limitations we wish to fix on the consequence of a question. Such a language is normally alluded to as decisive. This appears differently about the alleged procedural dialects where a program indicates a rundown of tasks to be performed successively to accomplish the ideal outcome. PL/SQL includes specific and iterative builds (for example circles) to SQL.
PL/SQL is generally helpful to compose triggers and put away systems. Put away techniques are units of procedural code put away in an assembled structure inside the database.
Advantages of PL/SQL-
Square Structures: PL SQL comprises of squares of code, which can be settled inside one another. Each square structures a unit of an undertaking or a coherent module. PL/SQL Blocks can be put away in the database and reused.
Procedural Language Capability: PL SQL comprises of procedural language develops, for example, contingent proclamations and circles like (FOR circles).
Better Performance: PL SQL motor procedures numerous SQL explanations at the same time as a solitary square, in this manner lessening system traffic.
Blunder Handling: PL/SQL handles mistakes or special cases viably during the execution of a Oracle PL/SQL Online Training program. When an exemption is gotten, explicit moves can be made relying on the sort of the special case or it very well may be shown to the client with a message.
Introduction to Programming Languages
Introduction to PL/SQL
The Advantages of PL/SQL
Variable and Constants
Using Built_in Functions
Conditional and Unconditional Statements
Simple if, if… else, nested if..else, if..else Ladder
Selection Case, Simple Case, GOTO Label and EXIT
Iterations in PL/SQL
Simple LOOP, WHILE LOOP, FOR LOOP and NESTED LOOPS
SQL within PL/SQL
Composite Datatypes (Complete)
Cursor Management in PL/SQL
Cursor with Parameters
Cursors with LOOPs Nested Cursors
Cursors with Sub Queries
Record and PL/SQL Table Types
PROCEDURE with Parameters (IN, OUT and IN OUT)
POSITIONAL Notation and NAMED Notation
Procedure with Cursors
Dropping a Procedure
Functions in PL/SQL
Difference between Procedures and Functions
Using stored function in SQL statements
Creating PACKAGE Specification and PACKAGE Body
Private and Public Objects in PACKAGE
Types of exceptions
Pre Defined Exceptions
SQL Error Code Values
Types of Triggers
Row Level Triggers
Statement Level Triggers