PL/SQL Tutorial

PL/SQL is Oracle’s procedural extension of SQL used to write database programs. It combines SQL with procedural programming features for building database applications.

• Developed by Oracle Corporation for Oracle Database systems.
• Allows users to create procedures, functions, triggers and packages.
• Supports operations like data manipulation, control flow, exception handling and transactions.
• Used for automating tasks and developing scalable enterprise applications.

Before learning PL/SQL, it is recommended to understand the basics of SQL, which is the standard language used for database operations.

Basics

PL/SQL basics include Introduction, Anonymous Blocks, Environment Setup, Data Types, Variables, Comments and Constants for building efficient database programs.

• Introduction
• Architecture
• Anonymous Block
• Data Types
• Variables
• Comments
• Constants

Operators

PL/SQL operators are used to perform calculations, comparisons and logical operations for controlling and manipulating data in PL/SQL programs.

• Introduction
• AND
• NOT
• IN
• LIKE
• BETWEEN

Control Flow

PL/SQL control flow provides statements to manage and control the execution of PL/SQL programs efficiently for structured program flow.

• IF THEN
• CASE
• GOTO
• LOOP
• FOR LOOP
• WHILE LOOP
• CONTINUE
• String Handling
• Arrays

Query

PL/SQL queries provide statements to retrieve, insert, update, delete and manage database data efficiently for smooth database operations.

• SELECT
• INSERT
• UPDATE
• DELETE

Clauses

PL/SQL clauses provide specific instructions to filter, group, sort and control query results for efficient data management and database operations.

• WHERE
• Group By
• ORDER By
• HAVING
• LIMIT

Aggregate Functions

PL/SQL aggregate functions are used to perform calculations on multiple rows of data and return a single result.

• Introduction
• Count()
• SUM()
• MIN()
• MAX()
• AVG()

Data Constraints

PL/SQL data constraints ensure data integrity and accuracy by setting conditions on what kind of information can be stored in a table.

• Primary Key
• Foreign Key
• UNIQUE
• NOT NULL
• CHECK
• DEFAULT

Joins

PL/SQL provides different types of joins to combine and manage data from multiple related tables efficiently.

• Introduction
• Left
• Right
• Full
• Cross
• Outer
• UPDATE
• DELETE

Procedures & Functions

PL/SQL procedures and functions help automate tasks, organize code efficiently, perform calculations and return results within database programs.

• Procedures
• Basic Query
• Functions
• UPPER Function
• LOWER Function
• CONCAT Function
• CURRENT TIMESTAMP Function
• CURRENT DATE Function
• JSON Functions
• Datatype Functions
• LTRIM Function
• RTRIM Function
• Cursor Variables

Records & Cursors

PL/SQL records and cursors help store and process query results efficiently within database programs.

• Record
• Cursors
• Cursor Update
• Cursor FOR LOOP
• Cursors with Parameters
• REF CURSOR

Views

PL/SQL provides features to create, manage and use views for simplifying complex queries and controlling data access within a database.

• CREATE
• DROP
• UPDATE
• RENAME

Indexes

PL/SQL provides support for working with indexes to optimize data retrieval and improve database query performance efficiently.

• Introduction
• Create Index
• Drop Index
• Show Indexes
• Clustered Index vs Non-Clustered Index

Exception Handling

PL/SQL provides exception handlers to detect, manage and handle runtime errors gracefully, ensuring smooth and reliable execution of PL/SQL programs.

• Introduction
• Exception Propagation
• RAISE Exceptions

Miscellaneous Topics

PL/SQL provides advanced features like packages, triggers, collections, transactions, subqueries, CTEs, security, partitioning and dynamic SQL for efficient and powerful database development.

• Package
• Triggers
• Associative Array
• Nested Tables
• VARRAY
• Transactions
• Subqueries
• Common Table Expressions
• Security
• Partition
• SQL Injection

Interview Questions & Quiz

PL/SQL interview questions and quizzes help users test their knowledge and prepare for technical interviews and assessments.

• Interview Questions
• Quiz

Related Articles

• SQL Tutorial
• MySQL Tutorial
• PostgreSQL Tutorial
• SQLite Tutorial